While some of the standard length 8 rounders work fine, if I wanted 8 rounders these days, I'd choose one with a longer tube length. Some examples would be the Wilson ETM, McCormick RPM, Tripp, or CheckMate Extended tube mags.I'm think of adding a .45 1911 to my CCW and I'd like to see if 8 rd magazines are worth using. To date I've had no issues with 7 rd Check Mates----are the 8 rounders as well behaved?
Just for clarity, McCormick doesn't make a flush fit "PowerMag". The "Shooting Star" and "Match Grade" models are available as flush fit mags, but all the PowerMag models have an extended tube (not a lot) and a bumper pad.My 5" 1911 will function with flush CMC power mags and any extended mag. But my commander length 1911 does not like the flush 8 round power mags.
Also for clarity, while the McCormick PowerMag is not a flush fit mag, I'd not consider it an "extended tube" in relation to what most consider an extend tube mag these days.I like the extended 8rd tubes.
For 45 I use: Tripp, CMC PM/PM+/RPM, WC ETM.