scooter123
Member
Feed ramp intrusion into the chamber isn't isolated to early Glocks. With barrel lengths shorter that 3.5 inches some intrusion can be essential to obtaining a reliable feed cycle and the 40 caliber Shield has started to gain a reputation for bulging case. A simple way to test for this with fired brass is to take some calipers, hold them about 3/16 inch above the base, and rotate the case while noting the measurements. If you find an "out of round" condition above about 0.015 inch you have a bulged case. You can also roll a case on a smooth table top and see how "smoothly" it rolls.
If you have a pistol that bulges your cases by 0.015 to 0.025 inch I believe that you would be safe reloading those cases up to 5 times. However, I don't think you should try and push that and you will obviously have to segregate those cases from those from other pistols. You will also want to purchase a 40 caliber Lee Factory Crimp Die and their Bulge Buster kit for this die. I also wouldn't advise reloading any cases with a bulge exceeding 0.025 inch. While brass is actually a lot tougher than some may think a 40 caliber case isn't so expensive that you need to reload every one you find or have.
I'll also note that my only experience with bulged 40 caliber cases are range brass picked up by mistake and I haven't had any problems after bulge busting those occasional cases. Note, rather than purchase the Lee kit I simple used a SHCS set on the case holder to push the case through my FCD. Not really too convenient but for 5 or 10 cases at a time useable. I'll also note that I like the 40 S&W and load it from rather mild with 950 FPS 180 grain plinkers to 165 grain hand stingers at 1150 fps.
If you have a pistol that bulges your cases by 0.015 to 0.025 inch I believe that you would be safe reloading those cases up to 5 times. However, I don't think you should try and push that and you will obviously have to segregate those cases from those from other pistols. You will also want to purchase a 40 caliber Lee Factory Crimp Die and their Bulge Buster kit for this die. I also wouldn't advise reloading any cases with a bulge exceeding 0.025 inch. While brass is actually a lot tougher than some may think a 40 caliber case isn't so expensive that you need to reload every one you find or have.
I'll also note that my only experience with bulged 40 caliber cases are range brass picked up by mistake and I haven't had any problems after bulge busting those occasional cases. Note, rather than purchase the Lee kit I simple used a SHCS set on the case holder to push the case through my FCD. Not really too convenient but for 5 or 10 cases at a time useable. I'll also note that I like the 40 S&W and load it from rather mild with 950 FPS 180 grain plinkers to 165 grain hand stingers at 1150 fps.