Harrison
US Veteran
I have used them in my IPSC 1911, in 45acp with complete satisfaction since about 1994. Well over a 100,000 rounds of major PF ammo through it without any frame battering or frame/slide breakage or peening. Usually replace when needed which is somewhere between 500-700 rounds. Of course I field strip the pistol everytime after I fire it, to clean and inspect, to include inspecting the shock buff. If your buffs are only lasting 100 rounds, you might have problems with springing either too light or worn recoil springs. Recoil springs don't last forever.