My updated position paper on +P ammo (a bit long).

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SaxonPig

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I was a little surprised when I began visiting these Internet forums and saw so many questions regarding +P .38 Special ammo. It seems each new day brings yet another post asking about the safety of using factory +P ammo in one gun or another. I always assumed the short answer was that if you had a Star, or Ruby, or some other gun that might be questionable as far as strength is concerned, then stay away from +Ps. But many shooters seem concerned about using this ammo in quality guns of recent manufacture* and I didn’t expect that. I saw many inquiries about K frame S&Ws using +P and I found it odd that anyone would worry about using factory +P ammo in such a gun. Then I started seeing postings from owners of .357 Magnum revolvers asking if +P .38 Special ammo would harm their guns. One forum member was concerned that +Ps would damage his Model 28 S&W.

Come again? I don’t know what caused such a mystique to surround +P ammo to make people with N frame Magnums think it’s too much for their guns, but it strikes me as overblown all out of proportion. The fact is that +P isn’t “all that” anyway. Winchester, Federal and Remington list the velocity of the 125 grain +P at 925-975 FPS. These velocities are actually fairly mild. I have shot many rounds of Remington 125 grain +Ps in a 1942 S&W Military & Police revolver and I can literally shake the fired cases from the gun without using the extractor. In my opinion these loads are actually pretty mild and show no sign of even moderate pressure in any of my guns.

Why is everyone so terrified of +P? I believe that +P is a marketing ploy used to sell ammo and any perception that this ammo is powerful is a myth.

The factory ammo made back in the 1960s and 1970s was hotter than that made today. I have seen the specifications for standard .38 Special ammunitions from a 1940 catalog listing the velocity as 960 FPS with a 158 grain bullet. This load would clearly develop higher chamber pressure than the current +P load and yet it was used for decades in all models from Colt and S&W without incident. The current +P is really about what the .38 Special should be in standard form. But note that the standard load is no longer what it once was, either. In 1940 it was the 158/960 that was considered standard. During most of my youth the load was advertised as 158/870. Current specifications are pretty wimpy at 158/750. Again, we see the ammo companies reducing the loads over the years. The current +P (which means +Pressure if you didn’t know) is really only +P when compared to current standard loads. Stacked up against past standard loads the +P looks pretty anemic and the current standard load is truly pathetic.

The fact is that +P is only called +P in comparison to the standard .38 Special loading, not because it exceeds the pressure limits set for the caliber. The SAAMI pressure limit for the .38 Special is 21,000 PSI (the .357 Magnum is 35,000 for comparison). The standard load for the .38 Special as offered by Winchester, et al, generates 16,500 PSI. This is so far below the maximum allowable as to be ridiculous but the ammo makers fear lawsuits from people using the ammo in cheap guns. The +Ps from these manufacturers run about 18,000 PSI. This is more than the standard loadings (hence the +P designation) but is still far below the maximum allowable pressure. Those "really hot +P loads" from the specialty manufacturers like Cor-Bon, etc., are simply loaded to the caliber's full potential of 21,000 PSI and should be perfectly safe in any quality arm in good condition.

So why are we seeing these less powerful loadings? Because there are some guns out there that are not well made. Because of liability concerns the ammo makers must load their products to pressures that are safe in these lower quality guns. They mark the "high pressure" loads as +P (even though as I noted they really aren't high pressure) to give them legal cover should someone hurt himself shooting this ammo in a cheap Spanish S&W knock-off of dubious quality.

S&W ran advertisements in the 1930s and 1940s specifically stating that the .38/44 load, which pushed a 158 grain bullet at an advertised 1125 FPS making it far more powerful than the current +P load, could be used in the K frame revolver. Colt ran similar ads for using this ammo in the Detective Special. If these 1930s-era medium frame revolvers could handle the 158/1125 Heavy Duty loads, why should anyone worry about the same guns shooting the current 125/975 loads labeled as +P?

Lee Jurras started Super Vel in the 1960s. This was maybe the first of the specialty ammo companies and he offered truly high performance .38 Special loads. I have some of the 110 grain loads and they clock around 1300 FPS. Based on this I would guess his 125 loads would go around 1200 or so. This would be a true +P load but it’s still lighter than the old .38/44 load. I don’t recall seeing or hearing of guns being damaged by this ammo.

Check out a reloading manual from the early '70s. The Speer #8 from 1970 has one listed for the .38 Special pushing a 158 JHP to 1,250 FPS, one for the 125 grain bullet at 1426 FPS and one for the 110 grain bullet at 1536 FPS! A 1971 Sierra manual shows a load for the 125 grain .38 Special at 1250 FPS. Sort of makes that factory +P at 975 seem less intimidating, doesn't it? Now, of course, new manuals don't include listings that are this hot. Now they stop at about the same levels as the factory +P. Why? Lawyers and lawsuits are the reasons why. The reloading manual publishers are just as scared as the gun and ammo makers about being sued. Fear of lawsuits is the same reason the gun makers caution against the use of +P ammo. They also say don’t use reloads. They have to say this on advice of counsel to protect themselves.

I load 125s at 1,100 FPS in my .38 Special carry guns. This load came from the 1970 Speer manual and is not the top load listed. I have shot many rounds of it through both K and J frame guns and they seem to work just fine. Recoil is slightly more pronounced than with standard ammo, but the cases fall from the cylinder with no sticking and I see no signs of excessive pressure. Just for fun I once put 6 rounds of this ammo through an old small-frame Rossi revolver. Nothing bad happened although I wouldn’t advise using this ammo in such a pistol.

Ask yourself this question: Would any ammo maker in today's litigious environment sell any ammunition that would be unsafe or harmful to use in the typical gun that a consumer may own? If factory +P were really hazardous would Winchester, or Federal, or Cor-Bon sell it to the general public?

With all the many, many questions regarding the safety of +P ammo, there must be many reports of blown-up guns, right? How many guns blown-up by factory +P ammo have you seen? How many guns blown-up by factory +P ammo have you heard about? I have been participating in the shooting sports and studying firearms since 1967 and I know of absolutely NONE.

Certainly, using a gun causes wear. A gun is a machine and using any machine will cause it to wear. Using hotter ammo will likely accelerate the process to some degree. But a quality gun from S&W or Colt or Ruger will not blow up with +Ps. Nor will it excessively stretch the frame or split the barrel in my opinion. It will possibly wear a little faster, and I doubt if anyone could predict how much, but I think the added wear on a good gun will not be all that much. The gun would probably still last longer than the man who owns it.

I admit to paranoia about warm loads in an alloy-framed gun. I do not have any alloy revolvers but if I did I would stick to standard ammo even though it seems obvious from my research that current factory +P is hardly any warmer than the original standard .38 Special load. In a steel gun of good quality I have no concerns at all about +P on a regular basis since I consider factory +P to be nothing more than standard pressure, anyway.

This is just my opinion based on personal experience and research. There are differing points of view. Some replies to the +P question are quite adamant about avoiding regular use of this ammo. Others advise occasional use. Some say only carry +P for defense but don’t use it for practice at all. The fact that there are so many answers to this question tells me that there is great confusion on this matter. I’m a simple man and I take a simple course to the truth. I do basic research and try to find the facts. I have presented the facts as I see them. All one must do to find the truth about current factory +P ammo is look at the specifications. I submit that a 125/975 load is hardly high performance, and certainly nothing to cause concern for owners of quality revolvers. All are free to disagree.

Some forum members have accused me of being irresponsible in recommending the loads I mentioned. Of course, I am not recommending anything, only stating what I do. Also, all of the loads I use came from reputable reloading manuals. If the loads were safe in 1970 I don’t see why they aren’t safe now, but I don’t recommend anything to anyone. Each of us has to make our own choice. If you think any of the loads I mentioned are too hot then avoid them. If you are in any way uncomfortable with +Ps then stick with standard loads.

* The manufacture and tempering of steel was imprecise before around 1930 or so. Any of my guns made before this date get reduced loads just to be on the safe side. Note that early S&Ws, those made before around 1918, had cylinders that were not tempered at all. A similar situation likely is true with Colt revolvers but I have no specific knowledge of when Colt began tempering their cylinders.

PS:

This same situation that has affected the .38 Special occurs with the .38 Super. The original loading for the Super was a 130 FMJ at nearly 1,300 FPS. But the Super cartridge is the same physical size as the old .38 ACP, just loaded to higher pressures so the ammo makers started fretting over some yahoo stuffing Supers into his 1905 Colt in .38 ACP and spreading parts all over the range. That’s why Super cases were nickel and the .38 ACP were brass until a few years ago, so shooters could instantly recognize which ammo they had. I was curious a few years ago when I noticed that they stopped doing this and I saw Super ammo in regular brass cases. I guess there’s no need any longer since factory Super ammo now clocks about the same as .38 ACP. The last box I checked ran 1,120 FPS, only 40 more than the ACP. They have down-loaded the Super to nearly the same level as the ACP. No lawsuits. Of course, the Super isn’t so… super… any longer, is it?
 
WOW, that is GREAT information. Thanks a lot!

I just wanted to add that I regularly shoot Speer .38+P ammo in a stainless Rossi 88 and I have yet to see any ill effect. Also, I wouldn't have any reservation about shooting a steady diet of any commercial load in a .38 Ruger (Six series, GP or SP).
 
Hmmmmmm.

One thing I notice is that you're completely ignoring the pressure differences of jacketed vs. lead rounds. 158gr lead at the same velocity as 125gr JHP can indeed end up right around the same pressure.

You're also ignoring some historical points...the 38-44s in K-frame 38s were damaging them. Dunno about the Colts in frame sizes bigger than the Dick Special.

You're also missing how there have been warnings regarding older loading manuals for two reasons: the powder formulas have shifted over the years even for what's supposedly the same powder (2400, etc.) and there have been extreme improvements in pressure test measuring since the '70s.

In short, using the recipes from a 1970 reloading manual isn't something I'd be inclined to do.
 
I am told by someone who was there that after WW II S&W started advising against the use of the 38/44 ammo in the K frames claiming that there was increased wear. Someone else suggested that they wanted to sell N frames and didn't want owners of the many K frames to simply buy the hotter ammo. I dunno 'bout that. I did speak to a retired police officer who carried a K frame and he told me that the department had a large stock of 38/44 ammo left over from when they issued Hevy Duty model S&Ws and he shot several thousand rounds of it through his Model 10 during a two-year period (he said this was 1958-1960 so it must have been an early Model 10) and he noticed no damage or excessive wear to his revolver.

I'm not trying to ignore the differences between lead and jacketed bullets but I'm not sure how much difference exists. I don't recall seeing any figures on comparing the two but if you have a source for some I would like to see it to help me understand this situation. Lead is softer than copper, but lead bullets are usually sized a bit larger to seal the bore so I'm not sure how they actually compare. My first reaction is that there probably isn't a tremendous amount of difference but I may certainly be wrong and I want to know for sure if I can find the info.

I realize that some powder formulas have changed over the years but I doubt that we're talking huge differences here. Note that I (and others) are indeed using the old loading data and I am getting about what the manual states I should be getting in velocity. I would be seriously surprised if the newer formulas really did much other than improve stability and shelf life in the powder. I can't see them making changes that simply increased the chamber pressures.

Again, I am suspicious of recent warnings from ammo makers and suppliers of reloading supplies because I think that for the most part these are based on advice of counsel rather than any real danger or change in the products. I can see no other cause for the major ammo companies to keep reducing the power levels in their loadings.

Like I said, I am not advising anyone to do anything. Everyone is free to call me a crackpot (or worse) and move on. I am only stating my opinion based on my research (including anecdotal evidence from personal contacts) and personal experience. My conclusions are that factory +P ammo is not nearly as potent as suggested, being rather wimpy in fact and no more powerful than what standard ammo was a few decades ago AND that a quality revolver will not suffer any undo harm or wear by firing this ammo.

This is my opinion. If anyone thinks I'm full of condensed apple sauce or still has concerns about shooting +P ammo in their Model 10, or Detective Special, or even their Model 28 then I say stick with standard .38 Special loads and sleep well at night. As for me, I do not believe any ammo maker would sell any ammo that would unsafe or unwise to use in a gun chambered for that caliber. If it says .38 Special on the barrel then I think ANY factory loaded .38 Special ammo is safe to use in it. Making the usual allowances for those cheap, imported guns discussed previously.
 
SaxonPig~

Good writing style, Sir.

Remember the blue and white Smith & Wesson ammunition from the early 80s? That .38-Spl stuff ROCKED compared to what I buy today.

Same with Federal and Remington ammo back then.

The one example I can think of today that hasn't lowered velocity/pressure in a .38/.357 revolver load is Remington R357M1 125-gr JHP. It still advertises 1450-fps from a 4" barrel.

Yikes!

(I own several boxes of this wonderful stuff) :)
 
Thank you for the information.

I have considered handloading, even as an informal shooter, just for the sake of improving the .38 special I use for practice. I'm still looking for reasonably priced ammo that's loaded hotter because the last time I loaned my revolver to a friend at the range, and he was using the same ammo I'd been using, I could watch every bullet leave the barrel and see it to the target. Pathetic is indeed the appropriate word.
 
Weren't some of the old velocity figures measured in longer test barrels than are commonly used today?
 
S&W ran advertisements in the 1930s and 1940s specifically stating that the .38/44 load, which pushed a 158 grain bullet at an advertised 1125 FPS making it far more powerful than the current +P load, could be used in the K frame revolver. Colt ran similar ads for using this ammo in the Detective Special. If these 1930s-era medium frame revolvers could handle the 158/1125 Heavy Duty loads, why should anyone worry about the same guns shooting the current 125/975 loads labeled as +P?

Can you post a scaned copy of a pre-World War Two Smith & Wesson advertisement stating that .38-44 ammunition was O.K. to use in K-frame revolvers? I find nothing like that in my catalog collection.

On the othr hand, Colt did advertise during the latter 1930's and early 40's that one could use .38-44 cartridges in their Detective Special, Police Positive Special and Official Police revolvers, as well as the New Service model. However following World War Two this recomendation was dropped.

One problem with S&W .38 1905 Hand Ejectors (Military & Police model) is that they didn't change in appearence from the time of their introduction until after World War Two. However over that time span many small changes were made, and heat-treated cylinders weren't introduced until 1919, so the word "older" in this case can cover a lot of ground.

The possibility or probability of Plus-P ammunition causing a "Ka-Boom!!" in an older gun (meaning post-1919) has never been an issue, although an expanded chamber is a possibility. Accelerated wear and tear is, especially when one looks at the wide performance standards that are found under the Plus-P label.

Occasional use is not likely to cause any problems, but I see little reason to use much Plus-P ammunition in revolvers not rated to use it. There are plenty of Plus-P rated guns offered by all of the recognized revolver makers in this county today, and anyone who feels the need to use the high-powered (?) stuff - which appears to be just about everyone - can easly resolve the issue by purchasing one of them.
 
Just remember that the higher velocities that the manufacturers used to advertise were based on 6" or sometimes longer, unvented barrels. Now it's 4" vented barrels. Unless there has been a change in chamber pressure over the years nobody can state with certainty that 38 special cartridges have changed. Are they any different today pressure wise than they were when the 38 special was loaded with black powder?

Saxon, I have an assignment for you since you have been on this crusade for a while. Contact the major cartridge companies and see if there have been any changes in chamber pressure over the decades in the standard 38 special cartridge.
 
Ron, you only need look at the published velocity figures to see that they have reduced chamber pressures over the years. Going from a 6" to a 4" test barrel would not cause a loss of 210 FPS (960 to 750). More like 50-60 FPS.

Old Fuff, I do not have a copy of the S&W ad but an advanced S&W collector who has a large volume of pre-war printed material told me about it and I have absolutely no reason to doubt his word.

My point in all this is that current +P isn't +P at all, being loaded to 2,500 PSI BELOW industry standards for the .38 Special. As far as I know, a S&W or Colt revolver made in 1918 was intended to shoot ammo generating 21,000 PSI. But over the years the ammo makers have backed off from that level, not because it was too much for the Colts and the S&Ws, but because they worried about the Stars, the Rubys, and the other crappy imported guns that were of poor quality and made with inferior materials.
 
There are many reasons to handload. I'm pushing a 140 grain bullet from a 2" gun to 931 fps which is pretty good and within +P pressure limits. However, the ability to tailor a load for accuracy as well as velocity and to make consistent practice loads cheap is another bonus. I also cast my own for hunting and practice, though I use factory hollow points for self defense, I must admit. But, I like being able to cast the same bullet for consistent loads when I need 'em. Some consider the time a waste, but I quite enjoy it.

The only reason I'll shoot a factory load anymore is because factory 9mm is dirt cheap. I can't reload much cheaper. Oh, I can reload a cast bullet for half what Walmart wants for a box of WWB, but hey, six bucks is pretty danged affordable and I save the brass so if you consider the price of once fired brass, it's a pretty good deal. I don't buy high end carry ammo, though, load my own.

Lots of good points on the +P thing and I agree you shouldn't load out of PO Ackley's 50s era manuals...:D ...but, reloading manuals aren't expensive and much data is available from magazine articles, pamphlets from the powder companies and such. Reloading is an interesting hobby in itself. Plan to go shoot some stuff over my chrony today, maybe, even though it's hot out there and the skeeters might carry me off at the range. :banghead:
 
Can someone post definitively on the accepted SAAMI pressures for standard and plus P .38 Special? I have always read that it was 17000 psi for standard and 18500 psi for plus P.

Speer recently e-mailed me that it is 20000 for plus P and 17000 for standard pressure when I queried them on the pressure of the 135 Gold Dot. They said Gold Dots do not exceed 20000. Their technical manual lists a pressure of 21500 psi which Speer told me is a "Maximum Probable Lot Mean", (meaning 97.72% of individual pressures in a test will be below this level)."

In these threads I have read 20000, 21000. Which is correct? Was it ever 18500?

I still believe that 20,000 or 21,000 psi would have a negative effect on an older-style alloy J-frame, meaning shortened life, not catastrophic failure.
 
Ron, you only need look at the published velocity figures to see that they have reduced chamber pressures over the years. Going from a 6" to a 4" test barrel would not cause a loss of 210 FPS (960 to 750). More like 50-60 FPS.
Some of the old test barrel lengths I've read (no hard evidence to support this, just digging stuff out of my memory) were much longer than 6". I seem to recall that the first figures posted for the then new .357 Magnum were derived from a test barrel that exceeded 8" in length--no mention of venting.

Gary A,

Most of the time, SAAMI limits are quoted in terms of MAP (Maximum Average Pressure) . I'm not sure how the MPLM figure that Speer quoted relates to that.

The Maximum Average Pressures figures for .38 Special I have seen are as below:

Standard pressure: 17,000psi (SAAMI)
+P: 18,500psi (SAAMI)
+P+: 22,000psi (NOT SAAMI, Informal industry standard?)
Maximum Proof Pressure: 27,500psi (SAAMI)
 
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Hmmmm.... Very interesting thread. What I am getting out of all this is
38 special +P is actually weaker then the original 38 special of long ago.
With the exception of the Corbon's and Buffalo Bore types, I could shoot
Speer 135 +P in a old colt or S&W and not worry about damaging my
firearm.....Does anyone agree or disagree with that ?

John!
:)
 
I found a thread on TFL that speaks about this subject.

http://www.thefiringline.com/forums/showthread.php?t=192490

Here is a quote from that thread:

here are the numbers from several mid to late 60s factory loaded ammo boxes...Winchester 38 special 158 gr lead...855 fps 255 ft lbs...

This makes me think. What really are the "true" .38 Special numbers? Is the new stuff downgraded or is the older stuff hotter?:banghead:
 
I do not believe the new 38+P's from the "big guys" are as powerful as yesterdays 38's. I think the same is true for 357 magnums.....


John!
 
Over the years the metallurgy of the guns have changed, the powders have changed and the method of testing [pressure barrels] have changed .There has always been a great difference in dimensions and therefore velocity.The old Speer book had an interesting chapter on this .They took 357, 125 grain ammo and fired it in various revolvers of the same barrel length . The resulting velocities IIRC varied from 1200 to 1600 fps , all from the same lot of ammo !! So we have standard loads, +P, +P+, and now even 'reduced recoil ' loads . It all muddies the water quite a bit .A little knowledge and wisdom [ very rare these days] can serve you well .Of course there are many who buy a gun a ask "how hot can I load it ?"
 
you only need look at the published velocity figures to see that they have reduced chamber pressures over the years
I do not believe... I think...
I think we might be getting a little ahead of ourselves.

I think that estimating pressures from advertised velocities (measured under unknown and varying conditions) is quite unscientific and likely to result in some severe misconceptions.

I think that the advertised velocities have been adjusted to match reality now that there's a good chance that a buyer will have a chronograph or a friend with a chronograph. If you go back to the seventies, chronographs outside of laboratories were very rare. These days they're available for under $100.

I think that the simpler explanation is that ammunition companies simply can't get away with publishing velocity numbers from testing revolver ammo in long unvented test barrels any more.

This is sort of like the "great awakening" that happened in the airgun world when chronographs started becoming common.
 
JohnKSa wrote: "The Maximum Average Pressures figures for .38 Special I have seen are as below:

Standard pressure: 17,000psi (SAAMI)
+P: 18,500psi (SAAMI)
+P+: 22,000psi (NOT SAAMI, Informal industry standard?)
Maximum Proof Pressure: 27,500psi (SAAMI)"
________________________________________________________________

Thank you, John, for that information. I was sure my memory said +P was 18500. Now, I really like the Speer load for sturdy, steel-framed revolvers. I do know that the Speer Technical Paper posted on their LE website states that the 135 grain SB Gold Dot produces Maximum Average Pressure of 21,500 psi (which to my mind puts it in +P+ territory. The response from Speer to my query said they do not exceed 20,000 psi, which the email says is the +P limit. The response said, as I noted, that the 21500 psi is the MPLM or Maximum Probably Lot Mean. The short is the Speer load is pretty hot any way I look at it and is well above 18,500 psi. In the technical paper, the gun used to test the load was a Model 640. I think I'll pass on them for my little 37-2, though I could see the circumstance where I might load the little critter with them, but I won't be practicing with them.
 
Thank you SaxonPig. I have an S&W 642-2 that I use as my primary CC weapon. I have shot a small number of +P through it and frankly I don't notice any difference in the recoil or muzzel report.
 
I notice an anomaly in standard pressure loads from winchester.

Some loads appear to have more power than others.

Win Q4196: 150 gr / 845 fps / 238 ftlbs (LRN)
Win X38S1P: 158 gr / 755 fps / 200 ftlbs (LRN)
Win USA38CB: 158 gr / 800 fps / 225 ftlbs (Cowboy Lead)
Win Q4171: 130 gr / 800 fps / 185 ftlbs (FMJ)
 
In the 357 we know that 158gr is easier on the gun than 125gr all else being equal. It's all about the speed of the hit at the forcing cone and back of the barrel. I see no reason to think the principle is different in 38.

We also know that plain lead drops pressure over jacketed. Hardcast, maybe not depending on width starting out but softer lead alloys as used by Winchester, Federal and Remington (and Buffalo Bore) in hollowpoints? Definately lower pressure.

Check BuffBore's numbers for their two 38+P loads. They're getting 50ft/lbs more energy out of their 158 lead than their jacketed 125s. Now these guys press the edge AND they're well known for publishing accurate performance statistics for named barrel lengths (2" in the case of these two loads). If they COULD get equal energy out of both loads, they would. They can't. If *they* can't, I don't see anybody else doing so.

--------

The issue of performance data being "tweaked" by ammo makers prior to the chrony-at-every-range-practically era is very well known. The much-vaunted "original 357" was a soft lead 158 doing between 1,500 - 1,600fps. But the original 357 GUN had an eight inch barrel! The initial data was published for that length tube. Today it's possible to hit that energy level with several 357 loads including of course :) BuffBore:

http://www.buffalobore.com/ammunition/default.htm#357

The more modern barrels of the Ruger and S&W L frame are "shooting faster" - a 180gr doing 1,400fps is delivering only fractionally less energy than the "classic superload" did out of an eight inch tube! I wish they had a full suite of data on the 6" barrel GP100 because based on what the 125 is doing it's very possible several loads will exceed the old load's power level with 2" less barrel.

(NOTE: we don't know how fast a 1930's-era barrel will shoot compared to a 1960s/70s-era S&W Model 27. We do know that an intermediate-era 27/28 doesn't shoot as fast as the newest S&W barrels or a Ruger tube.)
 
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