Help feeding Sig c3

Looking to pick someone's brain...I'm having a hell of a time reloading x -treme bullets 200 grain plated round nose at 1.23 c.oal using red dot powder charge of 4.5 grains. On my hornady lock and load. I have three 1911's an older s&w 1911 5 inch a new s&w e series 4 1/4" government and a sig c3 4 1/4" officers. The older s&w has about 500 rounds through it and eats whatever I give it . The newer s&w eats 90% of my reloads and the sig jams about 90% of the time when bullets are loaded at .473 crimp. when loaded to .469 crimp the sig jams about 10% of the time. Either I don't distort the bullet and the gun doesn't run or I indent the bullet and the gun still jams. The jams are a mixture of three point jams and ftrb usually I can make the round chamber by lightly pressing the rear of the slide with my thumb. But other times the gun locks up so tight it's not even funny. It runs factory ammo flawlessly. Please help because I'm losing my mind. [/URL][/IMG]

Tried the plunk test but after reading that thread you pointed out, I realized that I'm retarded and should stick to coloring books.... that was a real eye opener as far as properly determining oal goes. I realize that I have just been winging it as far as cartridge length goes. I was using a trial and error method and just making sure I didn't go below Sammi min

Thank you I will measure for proper oal but it looks as though you are right...it should be longer.