Chip McCormick POWER 10's are the best.....very reliable, x power spring, can be seated fully charged into 1911 with slide forward closed. I've owned them many times, had two of them for over 5 years fully charged in safe, never any issues when using at the range. A +++ 10 round magazines for 1911
Wilson Combat 47D 8 round are also great....and Chip McCormick POWER 8's are also great.
But I stick with Factory Colt 7 & 8 round mags, for my Colt 1991 and use POWER 10's at the range to keep ammo even with my Beretta M9 magazines lol