I have a smith and wesson m and p 9 c. I went to the range today to blow off some steam before finals and I bought some RWS ammunition. It was there and it was cheap so I figured why not for just target practice. When I loaded the mag and tried to rack the slide the shell would get about halfway in the chamber and then lock up. However, when I did finally get it to go into battery I could shoot a full mag problem free. Could it just be the ammo and if not does anyone have any ideas to remedy the problem? Thanks for the help.