I ordered the parts for my famous cooked pietta. They gave me parts for a colt instead so I'm sending those back. I was looking at my old post and I realized that the bolt of the gun had worn the cam on the hammer so much that the cam wasn't big enough to rotate the bolt all the way down. I wish I knew how to do pictures and I had some of the gun downloaded. My question was how do I keep this from happening again on that far off beautiful day when I get the parts? Thank you for any help.