I am having trouble reloading 45 acp rounds that will feed properly?

I reload with a Lee carbide die set and use the factory crimp die at the end. I am very specific about the correct procedures. My pistol cyles just fine with Winchester 230 gr factory ball ammo, but my reloads mostly jam. The cartridge will lack about 1/8" of being fully chambered. All I have to do is push the slide forward to chamber the round. I have compared all the physical aspects of my reloads to the Winchesters, and everything seems to matchup. I am seeking advice from anyone who knows what is going on. Thanks