#Bulged 9mm brass full#

Long story that I'm not going into online. 40s and were technically part of the Federal Police (you didn't know we even HAD a Federal Police, did you?)Įven though they worked secrity for our private company. In the matter of BLEVE-looking brass.remember Murphy.Ī friend was the security force training officer at the place where I had most of my career.

#Bulged 9mm brass full#

For such loads, an aftermarket barrel with full chamber support might be indicated. I have noticed small, slight 'smileys' on my Glock-fired 10mm brass that is loaded above '180 grain at 1150 FPS' levels-Winchester Silvertip and above, IOW (175 grainers 1250 FPS). That is as much as I can say.' I think we had our answer, such as it was. The rep smiled and said-'That is an astute assessment. The result is pressure containment failure, AKA 'Glock kB'. Murphy's Law gets no plea bargains, and eventually as luck would have it a case head area that had been reformed in this fashion multiple times-and weakened from same-will over-lay the unsupported chamber area. This distended brass got ironed out in its passage through a resizing die, which restored dimensions but work-hardened the swollen area of the case slightly with each such passage. I speculated on the causes of Glock kB sequences as follows-brass fired in Gen 2 Glock 40 S&W pistols took on BLEVE-like form in the case head areas at the first firing. I got the floor, and I told the guy that I was a pretty active reloader and shooter apart from work/Academy assignments. To say that Glock was 'sensitive about this issue' was a huge understatement. He had several range rats on his frame about the kB problem, including me-we wanted factory info and answers about the hows and whys. The chief discussion point was the Glock Ka-BOOM factor, to which the rep was chanting the mantra 'Use factory ammo'. Toward the tag end of my career I attended a meeting at our Academy in which some pooh-bah West Coast LE rep/suit (other less complimentary terms occurred to me at the time) from Glock was trying to sell Glock 40 S&W as a system for issuance en masse. Most people addressed The Glock Bulge by obtaining aftermarket barrels for their pistols to run reloads and cast bullets through. Glock's answer to this condition was the same response that most mainstream gunmakers chant-'Use only new factory ammunition in our products.' HERESY!! The early Glock 40s DID 'guppy' or 'smiley' their cases a bit, owing to the unsupported areas of the chambers in those pistols that birthed said anomalies. 'Glocked' brass in the 40 S&W got ameliorated with the design changes made in the 'Gen 3' 40 S&W pistol chambers.