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Questions
#3234113
10/04/20 10:32 AM
10/04/20 10:32 AM
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Joined: Apr 2013
Posts: 4,329 Northeast Florida
BamaGrad85
OP
10 point
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OP
10 point
Joined: Apr 2013
Posts: 4,329
Northeast Florida
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A buddy of mine was at range shooting his reloads and had a casing split on him. I guess that's what it's called. No damage to gun but range official asked him not to shoot anymore. Ejected shell and it was opened up on side of casing. What causes this? when he was telling me this, I asked if he measured his casings before actually loading, He said no. I know after shooting that casing will stretch some. I didn't know the answer why I trim mine other than I read it on Aldeer. If the case is longer , what can happen to shell? I told him I always measure before loading and after loading to make sure they aren't over recommended length. I think that's called COL. He said he measures some but not all. What say ye here on Aldeer?
I came, I saw, so I killed them all......Vern
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Re: Questions
[Re: BamaGrad85]
#3234216
10/04/20 02:15 PM
10/04/20 02:15 PM
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Joined: Jan 2003
Posts: 12,712 behind my Dillon
dave260rem!
Skinny’s Ex
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Skinny’s Ex
Joined: Jan 2003
Posts: 12,712
behind my Dillon
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Brass stretched case split. Remember BG your performing a small explosion every trigger pull. I once loaded a .38 special case 122 times before it split a .45 94 times but those are extreme examples. I'd bet Ol'AU338 only gets 5-7 loadings out of his big magnum loads before they work harden and rip.COAL(cartridge overall length) is why we trim.
Skinny is my EX.Alcohol was involved.
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Re: Questions
[Re: BamaGrad85]
#3234236
10/04/20 02:34 PM
10/04/20 02:34 PM
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Joined: Jan 2002
Posts: 1,112 Cullman
BentBarrel
6 point
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6 point
Joined: Jan 2002
Posts: 1,112
Cullman
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The camming action of closing a bolt creates a lot of force, pushing the loaded round into the chamber or pulling the fired case out. If a case is longer than standard length, you can actually "crimp" the case mouth, thus creating extra tension on the bullet. That extra tension raises the pressure and in extreme instances can cause high enough pressure to cause failures.... split necks, split cases, blown primers. Cases grow.... the brass flows/moves in the only direction it can go which is toward the barrel. Everywhere else its contained, by the chamber walls and the bolt face.
If its a good day, you have a bolt that is hard to open and a flattened primer. If its a bad day you get to ride to the ER, and trash your favorite rifle. If its a VERY bad day, you get a ride to the morgue. Don't cut corners. Don't guess. KNOW
Re-reading your post, let me add this: COL or COAL and case length are not the same. COL is the length of the cartridge, which is the length of the case plus the inserted bullet. Case length is the length of the empty case, you should see a "trim to" and a "max length" in the loading manual.
Last edited by BentBarrel; 10/04/20 02:52 PM.
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
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Re: Questions
[Re: BamaGrad85]
#3234356
10/04/20 05:56 PM
10/04/20 05:56 PM
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Joined: Jan 2003
Posts: 12,712 behind my Dillon
dave260rem!
Skinny’s Ex
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Skinny’s Ex
Joined: Jan 2003
Posts: 12,712
behind my Dillon
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I honestly think nickel plated cases are weaker than standard brass. Loaded some light plate loads in .45 in 55 brand new nickels and every dadblame one of'em split in 4 loadings. 231 and start charge for 200 rn bullet.
Skinny is my EX.Alcohol was involved.
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Re: Questions
[Re: dave260rem!]
#3234491
10/04/20 07:58 PM
10/04/20 07:58 PM
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Joined: Sep 2012
Posts: 18,057 North AL
AU338MAG
Old Mossy Horns
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Old Mossy Horns
Joined: Sep 2012
Posts: 18,057
North AL
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Brass stretched case split. Remember BG your performing a small explosion every trigger pull. I once loaded a .38 special case 122 times before it split a .45 94 times but those are extreme examples. I'd bet Ol'AU338 only gets 5-7 loadings out of his big magnum loads before they work harden and rip.COAL(cartridge overall length) is why we trim. That's about right. Start seeing split necks on my magnums on the 6th or 7th load. When I got my 338 winny back in 97, I bought 100 nickel plated Remington brass to load. It was good stuff, got 7 loads out of it before necks started splitting. It was stretchy, had to trim those cases at least every other firing.
Dying ain't much of a living boy...Josey Wales
Molon Labe
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