Ok I have a Sig 226 in .357 Sig. Today I picked up a .40 Barrel for it and droped it in. When I went to load up the mags I got 9 rounds in fine but when I tried to get #10 in there I thought I was going to have to get a Hydraulic Press to do it. All three mags were like this. Even the one marked 357sig/40S&W. Wo whats the deal. is this normal. I almost had to pound on the butt of the mag to get it to load properly. Whats up guys?