[QUOTE=ToddG;72149]Yeah, sorry for the repeat on caliber - I read the thread too fast first time trough.
Here's the reason I prefer Tripps: Wilson mags were first 45 mags, then modified to sub-caliber. Keep that in mind. Second, SA fits slide stops very tightly. Without good strong springs, you may get failure to lock on empty. Though, I do not have the 9mm experience some do. My 1911s all "shoot major."
Tripp's 9mm were 9mms from the start. Metal followers that engage the slide stop more aggressively and better no-tip followers in my limited experience. That's why I use them exclusively for my 10mms and 38Supers.
But again, I'm far, far from a 9mm 1911 expert.
Cheers,
Bill
ETA: You might not notice a failure to lock back problem from the start by racking the slide back by hand. Again, this is 38S experience being translated to 9mm experience. YMMV.