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  #1  
Old 05-29-2020, 07:00 PM
45ofcourse 45ofcourse is offline
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Recrimp factory ammo

So as I'm crimping some lswc to ensure feeding my mind was wandering as it seems to enjoy doing. I haven't bought factory ammo for many years. Thats not true, I buy .380 for my lcp. Anyway... with all you read about this gun or that gun wont feed this or that ammo, has anyone tried shortening oal or recrimping factory ammo? Ive never heard of it being done.
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  #2  
Old 05-29-2020, 07:46 PM
Autonomous Autonomous is online now
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There may be a reason you've never heard of it.
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  #3  
Old 05-29-2020, 08:36 PM
flechero flechero is offline
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shortening COL in factory ammo... the risk is not worth it. too much you don't know about the load.

I have fixed crimp and reduced COL(on fmj) by a few thou in my own ammo before. The difference is that I had all the info and could verify it was safe to do so.
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  #4  
Old 05-29-2020, 09:01 PM
45ofcourse 45ofcourse is offline
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Quote:
Originally Posted by Autonomous View Post
There may be a reason you've never heard of it.
Quote:
Originally Posted by flechero View Post
shortening COL in factory ammo... the risk is not worth it. too much you don't know about the load.

I have fixed crimp and reduced COL(on fmj) by a few thou in my own ammo before. The difference is that I had all the info and could verify it was safe to do so.
After your thoughts and putting a little more of my own into it it seems like a possibly dangerous thing to try.
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  #5  
Old 05-29-2020, 09:30 PM
Chris1971 Chris1971 is offline
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Quote:
Originally Posted by Autonomous View Post
There may be a reason you've never heard of it.
Exactly.
Not when you can’t positively ID the powder and exact charge weight and have load data available for it.
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  #6  
Old 05-29-2020, 10:33 PM
jjfitch jjfitch is offline
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Factory ammo is spec'd to a "one size fits all" so it, well, fits everything, right!

Now come the custom gunsmiths and match chambers. This is where we part ways with the "one size fits all" scenario.

I was issued a boat load of "factory" 45ACP LSWC match ammo that was a few thou too long for my hard fit match barrel and choked. I could get it to fire but I had to bump the rear of the slide. Setting the COL .010 deeper and .470 crimp did not change the POI at 50 yards.

In no way would I recommend reseating full power factory ammo .010 deeper. This could lead to overpressure issues and even a "KABOOM"!

All the best,
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Last edited by jjfitch; 05-29-2020 at 10:38 PM.
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  #7  
Old 05-30-2020, 12:52 PM
jjavedas jjavedas is offline
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what your saying is,you've done a 'plunk test with factory,one size fits all,ammo' and it doesn't plunk? if so don't try and fix the ammo,have a gunsmith look at the gun.possible warranty issue? if not have the smith open the chamber,if that's the problem, he should know. or dump the piece of crap, and get one that shoots over the counter box ammo,think safety.
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  #8  
Old 05-30-2020, 12:56 PM
jjavedas jjavedas is offline
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I just thought about it, is this .380 worth the struggle, there's a lot of good 9mm conceal carry pieces out here.
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  #9  
Old 05-30-2020, 04:32 PM
TRSOtto TRSOtto is offline
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In 40+ yrs of shooting and 40+ different 1911 pistols, I've only had 1 pistol that failed to feed ammo, and it didn't matter if it was factory or reloads. So I've never had any reason or inclination to crimp factory ammo.
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  #10  
Old 06-13-2020, 12:43 PM
Meistermash Meistermash is offline
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I had some factory blazer brass 45 that had setback problems.
So I ran the majority threw the press and crimped harder.
But I shant be purchasing that stuff again.
Fmj? No plated soft bullets and small primer pockets to boot.
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  #11  
Old 06-13-2020, 01:00 PM
mikld mikld is offline
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When I buy a new pistol I often buy a box of factory ammo (for my 45 ACPs I often get Remington 230 FMJ). My 3, 45 ACPs, my 4, 9mm, my 380 and my 32 ACP have never stuttered on any factory round. I then reload with different bullets and the only bullet to have feeding problems is a 200 gr. SWC in one of my 45s. If a factory round won't chamber/plunk correctly I look at my gun first...

FWIW my 380 ACP SCCY is a fun gun to shoot, accurate and while not as powerful as a 124 gr JHP from my 9mms, it is no slouch. I get around 900 fps from my 90 gr Gold Dot JHP loads and right around 1,000 fps from my 88 gr loads. I certainly wouldn't feel under gunned carrying it and really wouldn't wanna be shot with it...
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Last edited by mikld; 06-13-2020 at 01:09 PM.
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  #12  
Old 07-02-2020, 03:52 PM
Rock185 Rock185 is offline
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I didn't change factory seating depth, but have on two occasions crimped factory ammo.
Two or three years ago I bought a couple boxes of Federal 9MM 124 +P HST. One box had obviously missed the factory taper crimp station when it was manufactured, and all 50 rounds still had belled case mouths. I taper crimped it and chronograph the ammo, comparing it with other factory HST I had. No significant difference in velocity, velocity spread or standard deviation.

More recently bought some of the new ELEY .38 Super Comp to try out. The cases were still slightly belled. I crimped some, and compared it to ammo from the same box that was still belled from the factory. Again, insignificant difference in velocity,etc. In fact, the difference between the ammo I crimped, and the other uncrimped, still belled, ammo in the box was 2 FPS in one gun, 1 FPS in another gun.

Anyway, weird stuff happens sometimes to even ammo considered to be of good quality. But thankfully, not too often.
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