A bit of history, I have a Rock Island Armory 1911 in 10mm that has a slide that locks back on a magazine with rounds remaining. This happens only with "real" 10mm, not the typical .40S&W Long stuff. With the mild loads, it's reliable. Buffalo Bore, Underwood and handloads will often cause the slide to lock back, perhaps every 1 in 4 rounds. Simply releasing the slide (with the slide stop) or racking the slide loads the next round. So far, I've changed out the recoil spring with something heavier (I forgot what), replaced the firing pin stop with an EGW flat bottom FPS with small radius bevel and a heavier main spring. It feeds, fires, extracts and ejects wonderfully and it's accurate to boot. It's just the issue with the slide locking back on a charged magazine that keeps it from going with me during hikes. The problem is about the same now as it was before. I was thinking about purchasing an additional slide stop and make some alterations that prevent it from locking the slide. I know this a radical option, but I need this pistol to be reliable. Punching paper with it was wonderful, leaving perfect holes (powder coated 145gr SWC over 10gr of Power Pistol, standard WLP) right where I wanted it. It's a great pistol other than this issue. So, what can be done to a 1911's slide stop that will prevent it from engaging the slide? I think I have decent idea of what, but there's a wealth of knowledge here that I think could come in useful. I won't be using the original stop, but an extra from Brownell's or some such.