I have been loading lee tumble lube bullets in all my pistol reloads for a while now. I've seated the TL bullets all the way in except the lead wad cutting edge showing. anyway, i think that lead edge might be catching when the round head spaces on the case. In a couple of my 1911's the slide doesn't shut all the way a few times about 1 time per 10 or so shots, and i can only think of this being the cause. i am thinking of trying to seat the bullets so that the flat spot is flush with the case to avoid the lead lip hitting the inside of the chamber. Has anyone experienced this or have any thoughts on it?