At least a quarter of an inch above the load and wad fingers. It appears that the wad maybe interfering with the crimp. Skived hulls can also give problems roll crimping. Are you using a drill press or hand drill. I've found that an old hand cranked crimper gives me the best crimp. Some folks lightly lube the outer hull; others like to have a warm tool head. The crimp is formed due to the friction heat. It has to be Goldilocks right. Gil