.40 cal brass bulge?

herpinator45 said:
DO NOT LOAD BULGED BRASS!!!!! Look up Glock Kaboom or Glock KB. It is normal to have a bit of expansion around the bottom of the case above the extractor groove in the cartridge when fired in a service pistol with full power loads. But if you see a true bulge then scrap it, it is not something that you want to see if you can "fix"

I purposely have the clutch on my case pro setup that if anything with more than normal expansion goes through it shuts down the machine. Its a safety thing.
Click to expand...

Come on the sky is not falling. Most would never know whether the brass was bulged or not. The Glock Kabooms had several causes. I have never heard it they were ever attributed to prior bulged brass. Glock changed the chamber dimensions after the Gen 2's, likely as a result of the Kabooms in the early 40cal Glocks. If a bulged case loaded into a fully supported chamber all that is going to happen is the case will be sized to the chamber and the bulge removed. I have had brass split the full length of the case in handguns (Revolver and autos) and go completely unnoticed until the brass was retrieved. Rifle rounds are a completey different kettle of fish.

Take Care

Bob
 
The case splitting is not the issue, its when the case fails in the "bulged" area it actually sends a peice of brass out of the gun in the direction of your hand at significant velocity. Metal @ velocity = shrapnel.

So yes, the sky is not falling. At this point we are really discussing mostly hypothetical at this point as in the 250,000 + pieces of 40 I have run through my roll sizer over the past couple of years I have only seen 3 or 4 pieces that truly had the "smile"

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Here is a better picture of the Glock and it's barrels.



Note the gap at the six o'clock position. I have not seen any examples of unsupported cases other than the early Glock barrels. I did have a 45acp case let go when it was loaded with 10.2 gr of 231. Blew out the magazine and cracked the grips on my 1911. Aside from my ego and the crack in the wooden grip no damage was done to the gun. Note the exposed case of the 1998 version (Gen 1) where the area ahead of the webbing is exposed. While the gap contributed to the infamous Glock bulge in 40cal whether the gap itself played a significant part in the Kabooms is a matter of debate. I have read some suggestions that the guns fired out of battery due in part to the cartridge not completely chambering. This may have been the case with a series of incidents with the Portland Police and their use of reloaded ammo.

Take Caare

Bob

Take Care

Bob
 
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