I realize that you said you bought 8 round Wilsons.....but are you sure? I only ask because I recently moved and wanted to go shooting (to try out my newly acquired Kimber Pro Carry in Stainless). I'm a big fan of Kimber, but not their sights or magazines. So I grabbed a couple of mags that looked about right and voila! they wouldn't lock in the magwell. I couldn't believe it at first....my other Kimbers are so tight and wonderful...now
I have a piece of junk. Well, my fears were later laid to rest as I discovered (when I picked up my Kimber Compact) that the magazines in question fit it. The fact that I was still in transition of the move meant that I hadn't sorted the magazines with the guns and thus didn't know who fit what. Try your magazine out on a compact frame (Colt Officers', Kimber Compact, Colt 1991A1 Compact). If it fits, you don't have a problem (other than someone sold you some poorly labeled magazines). YMMV