Recently took a bunch of 1911's to the range . All are my new to me pistols I bought for SD . Majority are Full size 5'' & one is a LW alloy frame Officer size with a Commander slide . For years for my BE guns I bought Metalform mags because they were cheap & functioned well . If they didn't I 'd toss them . Well found out some of them wouldn't hold slide open after last round with full pressure or +P loads in 45 acp . For a range gun while aggravating but not life threatening . All these were the hardball mags with GI style followers with the tit . Even happened with a few in my NM " Hardball " gun . Needless to say they're going in the range only box . Had no problems with Mecgar mags or SA factory & Wilson 47D mags . Well I'm shopping for a bunch of new ones . Have been told that for Gov't size I want the CMC Power Mags or Wilson ETM's ( not the 47D ) . Compact alloy frame I've been told the CMC or Wilson with correct followers that will not contact the frame ramp . Again I'll state that these are for serious bet the farm use . I'd like some feedback before I buy . BTW pistols include SA TRP , RO , RO Elite , Custom built on a Nork , Custom built on a Caspian Recon & the LW . I've been using a Glock 30S for CCW for last couple years & it functions flawlessly with it's factory mags . I did put a minus connector in it & fitted a KKM barrel & Tru Glo NS . Quite accurate & controllable with Fed 230 HST +P & Horn Critical Duty 220 +P . Any thoughts or suggestions are welcome .