I tried the Wilson 10 rounder. It occasionally failed to feed which almost never happens with my Wilson 7 rounders. The last straw was when the little welded on piece on the front that prevent over-insertion, broke off. I sent it back to Wilson and asked them to replace it with a 7 rounder which they gladly did. I have considered trying one of the new Chip McCormick 10 round Power Mags but haven't made up my mind yet. It uses a rubber sleeve instead of a welded on piece.