You can use CMC 10 rd .45 mags if you "tweek" them a bit. The Metal Form 10 rd. .45 mags require no tweeking to function. I do load my .40 out to 1.200", but my gun will feed short rounds also. The only downside to the Metal Form mags is the little tab that prevents over insertion. It will chew up your frame. You can do one of two things to fix this. Weld a small piece of key stock in it's place or buy the 10 rd. Ed Brown mags. These are SS Metal Forms with a base pad and a welded on stop. Downside is cost. "Gunsmith" price at Brownells is $30. If you choose to stay with 9 rd. mags. I can recommend the 9 rd. Metal Form 10 mm mags.
[This message has been edited by Joe D (edited 10-10-2001).]
[This message has been edited by Joe D (edited 10-10-2001).]