I have a S&W 625-8 in .45 acp 6 shot 5 inch barrel revolver with the lock that I have only used once and,after 2,000 rounds of shooting standard,and +p .45 loads,even reloads,the lock hasnt so far auto locked on me while shooting. I dont like the IL lock either but,I have to live with it and since I am permantly disabled by major health and a new amputee,I like and love shooting revolvers. rz625-8