I guess I need to be the one to mention this but, two things this title suggests.
#1, Glock is the only one that causes this phenomenon.
#2, There is no way to avoid having this problem in a Glock.
I suppose that these things are nullified if you are just considering scarfing range brass that it has been known to have been fired through Glocks. They just get bad raps from time to time and really, and I can't believe I am saying this on the S&W forum, they are wonderful firearms.
The Browning High Power, along with many other semi autos that have a feed ramp that extends into the chamber, is capable of providing the same type of affect.
As a handloader, or a reloader, you can cut down on the effects of bulged cases via powder selection.
Look at the data for the 40S&W on the Hodgdon data website.
Take note of what the velocities are and the related pressures. There will be much less case flaring when the pressure is reduced. If you will notice the velocity can be where it needs to be and still have low pressure, again, depending on powder selection.
Take a look at this information:
180 GR. HDY XTP Hodgdon Longshot .400" 1.125" 6.5 1009 25,000 PSI 8.0 1159 32,300 PSI
180 GR. HDY XTP IMR SR 4756 .400" 1.125" 6.1 957 25,200 PSI 6.6 1018 28,800 PSI
180 GR. HDY XTP Hodgdon HS-6 .400" 1.125" 6.1 876 25,900 PSI 6.9 976 32,500 PSI
180 GR. HDY XTP Winchester AutoComp .400" 1.125" 5.8 975 27,700 PSI 6.3 1053 33,200 PSI
180 GR. HDY XTP Hodgdon Universal .400" 1.125" 5.0 973 26,500 PSI 5.8 1046 33,400 PSI
180 GR. HDY XTP Winchester WSF .400" 1.125" 5.4 946 28,000 PSI 5.8 1013 32,900 PSI
180 GR. HDY XTP Winchester 231 .400" 1.125" 4.1 797 23,800 PSI 5.0 947 32,900 PSI
180 GR. HDY XTP Hodgdon HP-38 .400" 1.125" 4.1 797 23,800 PSI 5.0 947 32,900 PSI
180 GR. HDY XTP IMR SR 7625 .400" 1.125" 5.2 935 27,900 PSI 5.7 999 31,700 PSI
180 GR. HDY XTP IMR PB .400" 1.125" 4.1 851 26,200 PSI 4.5 917 30,400 PSI
180 GR. HDY XTP Winchester WST .400" 1.125" 3.9 830 28,300 PSI 4.3 888 32,400 PSI
180 GR. HDY XTP Hodgdon Titegroup .400" 1.125" 4.2 877 26,500 PSI 4.7 978 33,300 PSI
180 GR. HDY XTP IMR 700-X .400" 1.125" 4.3 904 27,700 PSI 4.8 966 32,500 PSI
180 GR. HDY XTP Hodgdon Clays .400" 1.125" 3.0 727 26,000 PSI 3.5 847 34,300 PSI
I have been testing a load with SR4756. Having great results and I am shooting the through a Glock 22. No bulged cases and velocity with a 180gr PHP (Plated Hollow Point) in the 950fps range.
Here is a report on the testing:
http://smith-wessonforum.com/e...570103904/m/26610551