LPM Primers, what to do with them

Status
Not open for further replies.
webrx

webrx

Member
Joined
Nov 10, 2010
Messages
1,119
Location
Reno
I have a thousand LPM Primers - I needed LPPs and this was all I could find at the time. Now I need to figure out how to use them.

I have both .45 ACP and .45 Colt that I shoot and reload for but I have no Magnums bigger than .357 which use SP Magnum primers. I am running low on SPMs, but I am told I can get away with SPPs with the right powders (I have Bullseye, Titegroup, HP38 available) with .357, or of course I can just shoot .38s through them if desired.

1. So, questions are, load .45 ACP or Colt with these LPM primers (start low and work up). From what I have read (not done this) there is not a lot of difference between standard and magnum primers, but, I have no experience doing this.
2. What about BP loads in .45 Colt? Gut feel is this should be fine, since BP does not build the same pressures as smokeless.
3. Find someone who wants to trade for some SPMs or LPPs?

Any thoughts or advice from the good folks here on the High Road?

d
 
I use both. I work loads up for mag primers unless I'm making light or starting loads, then I just use'em.

I don't have a chronograph at present, so I go by feel. And just like everyone recommends, a slight reduction in powder charge feels right. I reduced the 45 auto charge I was working with by .2 last week and it felt the same. But I'm not running at the max, so there is some headroom.

In 44 special I have run them, and found a good load too. So, it's worth testing for me.
 
I'd load 5 of each with lpp and lpm primers and see how they feel. I am assuming you are not at the top of published data. If at top load lpm a couple tenths lower.

Like others said win primers do for both mag and reg so I doubt there is a huge difference anyway.

If you find an easy 1 for 1 local trade that is an option but I wouldn't do it.

No idea on black powder.
 
webrx said:
I have a thousand LPM Primers - I needed LPPs and this was all I could find at the time. Now I need to figure out how to use them.

I have both .45 ACP and .45 Colt that I shoot and reload for but I have no Magnums bigger than .357 which use SP Magnum primers. I am running low on SPMs, but I am told I can get away with SPPs with the right powders (I have Bullseye, Titegroup, HP38 available) with .357, or of course I can just shoot .38s through them if desired.

1. So, questions are, load .45 ACP or Colt with these LPM primers (start low and work up). From what I have read (not done this) there is not a lot of difference between standard and magnum primers, but, I have no experience doing this.
2. What about BP loads in .45 Colt? Gut feel is this should be fine, since BP does not build the same pressures as smokeless.
3. Find someone who wants to trade for some SPMs or LPPs?

Any thoughts or advice from the good folks here on the High Road?

d
Click to expand...
Option 3 saves you load work up. Option 1 is the easiest. Option 2 is fine but kind of a waste given the main real difference between standard and magnum is the cup thickness/hardness to contain higher magnum pressures. There’s a trade forum you can try.
 
I guess I should have said, but not sure it matters all that much, they are CCIs, I also have 900 CCI SRM primers that I got in trade for a couple federal value packs of .22LR.

If you were close, I would trade you Demi-Human - I have since found LPPs and SRPs so, these magnum primers no longer fill an emergency/critical need for me.

For a while I wasn't sure if I would ever find either at a reasonable price. For now I guess I can leave them in the cabinet in case this mess does not clear up in the next year or so, then I can work them up if I get bored, or if I run across someone local who wants to trade for something I have that option as well.

I have read online about others doing this, most of what I read was "sure no problem go for it" (which may really be true) but I wanted to check here as well, most of those saying go for it were not anyone who I had previously communicated with about reloading on THR that I recall. I usually search THR before the general Web and I did see a few folks I recognize and respect based on past posted information saying it ok, start low and work it up, I just wanted to take one more swing at this to see if there were any dissenting opinions.

Thanks all!

d
 
Don't automatically assume that LMPP will increase pressure or velocity, it depends!
Use Winchester load data for the powder and bullet you are using where WLMP's are recommended.
Reduce the powder by .2 grains if you are at the max charge otherwise just load and shoot.

The main difference in magnum primers is the LONGER spark necessary to maximize the ignition of magnum powders like W296, H110, and 2400.

Smiles,
 
45 LC would be my first choice, as modern 45 LC guns are built to withstand greater pressures than the original 45LC. If I remember correctly, the +P 45LC go to nearly 30,000psi.
What does this mean? Safety buffer against potentially over-pressured rounds.

...1000 pieces is a LOT of 45 LC, to me anyways.
Odds are, you might wind up using them for both calibers. Start low, and probably don't work up to more than say 3/4 of the published max powder charge just to be safe. I don't think they would be over-pressured at all, but weirder things have happened.
Good luck
 
I’d press them in the .45 Colt cases, load up my favorite load minus 10% to start, and fire away.

Ive had to use SPM in .38 Spl. cases due to the shortage, and SRP in .32 H&R cases because my Bisley Single Six appears to have a long firing pin and occasionally pierces primers with under max loads. In both cases I start with a lower charge than my regular SPP load calls for and work up to where I want to be. So far I have had no issues through a variety of guns.

Stay safe.
 
Ten or 15 years ago I bought 1000 Tula LPM to try out in my old M-29 S&W. I had several FTF in the first box I loaded, so I used up the rest loading .45 ACP softball for my P-220.

After a quick work-up I ended up using the exact same powder charge that I use with Winchester WLP's.

The Tulas worked fine in the SIG.
 
You can use those LPM primers in both the 45 ACP and 45 Colt. If you are not sure know this, Winchester manufacturers only 1 LPP which is marked "for use as both standard and magnum applications." (Not an exact quote but correct) Winchester doesn't stipulate you need to reduce your powder charge. You know if there were any possible danger they would say so especially in today's litigious society.

Of course you will want to be careful and take the precautions you would normally use when changing any component in your loads but they are safe to use.
 
I did a little testing when I was running out of LPPs and could only find LPMs. My results were similar to everything I've read about using LPM vs LPP. Although you didn't list WST as an available powder, I included that test because the observed results may be helpful if you decide to load/test the LPM's.

Hornaday 230 FMJ, 5.0 win 231/HP-38, 1.225 OAL, 44 deg, 10 shots.
Rem LPP, 739fps, SD 10
CCI LPM, 761fps, SD 17

T&B 200 SWC, 4.2 WST, 1.249 OAL, 70 deg, 7 shots.
Rem LPP, 802fps, SD 9
CCI LPM, 814fps, SD 4
 
webrx said:
For now I guess I can leave them in the cabinet in case this mess does not clear up in the next year or so, then I can work them up if I get bored, or if I run across someone local who wants to trade for something I have that option as well.
Click to expand...
Seriously??!! o_O This is like watching a Hallmark movie and at the 1 hour 58 minute mark the romantic leading "perfect couple" decides they really aren't compatible after all and just say, "Well, bye..." - close to credits.
What a let-down. :(
 
Sorry, just didn’t seem like a lot more to say .

Just for you, maybe I’ll load up a few of each and try them out, I hate when movies end like that.

I am kinda curious how they would work with BP loads also.
D
 
Last edited:
***follow published load data, no one here is responsible for your actions except you***

I streamline my inventory , I only buy mag primers if I have the option and have worked up all my loads using them. Yes, I'll use srm primers for revolver cartridges - never been an issue and really don't have a need for spp anymore. I haven't noticed any extra pressure (velocity) or loss of accuracy. Do your own testing and follow loading manual but if you're in a pickle use good judgement and don't be unsafe.
Mag primers and rifle primers have thicker and sometimes harder material, if your firing pin has the power, it hasn't been an issue for me.
 
Status
Not open for further replies.

Similar threads

KB Hill
  • Locked
Unique vs 231 with LPM in 45 ACP?
Replies
21
Views
967
Hanshi
Hanshi
C
  • Locked
Primer Explosive Power Ranking
Replies
12
Views
1K
CollinLeon
C
stchman
Regular or Magnum Primers in .44 Magnum?
2
Replies
29
Views
1K
cfullgraf
cfullgraf
AJC1
  • Locked
First time walking past primers on the shelf.
2 3 4
Replies
92
Views
4K
Mark_Mark
Mark_Mark
Joshua M. Smith
Any Issues Ever Discovered with Small Pistol Primers in .45acp?
2
Replies
43
Views
1K
StrykerByte.45
StrykerByte.45
Back
Top