I am relatively new to this forum, I hope for some input. I have a Springfield MilSpec .45 with less than 500 rounds shot through it. At times when I insert a magazine and rack the slide, the round won't chamber or if it does, it doens't fire. This happened to me today three times today using Wilson Combat magazines 8 round, and the factory 7 round magazines. I am using RN lead 230 gr., 4.0 grs. Bullesye. and CCI 300 primers. When this happens, I clear the chamber and reinsert the magazine without problems. At other times on the range I have no problems what soever. I thank you in advance for any input.