.357 load in .38spl case for .357 carbine rifle.

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Ever been to an estate sale where there is reloaded ammo for sale? I've gone to quite a few. Many times the heirs/spouse or auction house will combine mixed partial boxes to make full boxes for easier sales, and ease of displaying/moving. Many don't have a clue as to what they are doing, nor do they care, they just want to get rid of it. I have some reloads for revolver that were made with Lil'Gun. Not unsafe to shoot, but hard on revolvers that I need to get to and pull, just in case someone unknowingly uses them.

I sometimes buy that stuff, but I always knock out the bullets, discard the powder (who knows WHAT it is), and salvage the cases and the bullets for my own reloading. ;-)
 
I sometimes buy that stuff, but I always knock out the bullets, discard the powder (who knows WHAT it is), and salvage the cases and the bullets for my own reloading. ;-)
I've done that too(I never shoot known reloads from someone I don't know or even ammo I'm not absolutely sure is factory). Most times tho, I've found that others are willing to pay more that it's worth to me. Many times they don't know the ammo origin, bullet weight or anything else other than what the headstamp says, and they don't care. They just know they got a big box of ammo cheap! That is why I wouldn't put a mag load in a .38 case. I've just seen too many folks that are naive to the dangers of irresponsible handloaders and think they are just getting too good of a deal to pass up......and yes, IMHO, putting a .357 mag powder charge in a .38 case, even tho you yourself are supposed to be the only one shooting it, is irresponsible.
 
The general concensus seems to be "don't do it". Others seem to think it's OK, if certain parameters are met. The most common concern is someone accidentally loading one of these in a .38 revolver and blowing it up from the high pressure. This is NOT my concern, as I am loading for my lever action rifle in .357.

What I am wondering is, if a .357mag powder charge fits the case with PLENTY of room to spare, and no compression when the bullet is seated, does that extra 1/10th inch case really make that big of a difference? Because that slight extra case length seems to be the only difference between the two rounds, all other things being equal (bullet dimensions and weight).

The power I use has loading data for both .38 and .357 for the same powder, for the same bullet type and same bullet weight. 6.8gr vs.9.7gr

So, for a *rifle* load, is it OK?
First the cases are not the same. the 38 special is designed to work at right about 20,000 psi, while the 357 is set to perform at about 35,000 psi. Second, it depends on the lever action rifle. a Model 92 and you can probably make it work. a model 73 or like and it's not going to work as these are designed for a specific cartridge length. Screw up with the length and you'll have real feeding issues.
 
Hogdgons and others have 357 rifle data...that's different than 357 pistol data
Rifle data seems to be the same charge weights as pistols for H110 that I looked up just now
but barrel lengths and velocities are different.

Rifle uses 18.5 inch barrel
And pistol uses a 10 inch barrel

I'd like to get one of those 10 inch barrels.......sorry....thread drift

Kwallace
Have you tried 38 specials in your 357 lever?
Mine doesn't like them with the bullets I like using.....so I stick to 357 cases

Also I have found mine likes truncated cone bullets much more betterer than swc's
 
Rifle data seems to be the same charge weights as pistols for H110 that I looked up just now
but barrel lengths and velocities are different.

Rifle uses 18.5 inch barrel
And pistol uses a 10 inch barrel
That's right, max pressure is max pressure, it doesn't know how long the barrel is when it goes off, you just get more velocity from the longer tube. Unless you are loading light with a fast powder.
 
As already mentioned don't do it. A 357 load in a 38 case will have excessive pressure. The reason is the air room in a 38 is less than a 357 case. I suppose it could be like building in the dreaded bullet setback found in auto loading pistols using worn brass. I have a Marlin 94 Cowboy II Limited with a 24 inch barrel and Ballard rifling. I like this this rifle too much to be over loading 38 brass. By the way the weakest part of a 94 Marlin is the bolt which covers the ejection port.
 
I cringe every time a loaded 9mm Major round hits the deck at a USPSA match
No way I would ever shoot any ammo I found laying around at the range. ( unless I was positive it was mine, correct sharpie mark etc) I actually pick it up so no one else will either, take it home, break in down including depriming it.
I wouldn't trust a 9mm round to have a normal SP primer in it, might be a 9 major round with a SR or Mag pistol primer, not worth messing with for one primer/one round.



Send me your address via PM, and in the spirit of the season, I will send you some 357 brass.

Very kind of you to help the OP out mstreddy, kudos to you!
 
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