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Anyone ever had this problem or know the cause. It's one fired brass from Armscor fired from a Glock 20sf. The Hornady sizing die is putting a sharp ridge right at the case head. The ridge goes about 3/4 of the way around.
The brass may have been fired in a gun with an un-supported barrel (Glocked) and that
crease is formed when You try to Iron out the Bulge with Your sizing die.
Ya, that's a classic example of brass fired from a loose or poorly supported chamber, and then run through the wrong die for the job. A bulge buster die should prevent that condition, but it doesn't help much in terms of case life. Subsequent resizings of brass bulged like this becomes weakened, so a premature blow out is usually imminent.
I recommend buying an after market barrel to extend case life, Wolf is good.
I have the Lee Bulge Buster, these rounds didn't look that badly bulged so I just went for it with the sizing die. Non-bulged cases are still looking a little "scrapped" if that makes sense (kinda like the one on the far right). My plan is to run some un-fired through tonight along with some once fired that I ran through the Bulge Buster and see how they turn out. I'll post the pictures of both to compare. I'll post more picture around 7:00pm AZ time.
Ran about 10 through the bulge buster first and they came out fine. Though, I can't understand how a bulge in the case causes an indented line at the case head. But, that seems to be exactly what it's doing.
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