You know what's funny is that people have not had a problem reloading the NT pistol cases to normal pistol pressures. The bigger flashhole doesn't seem to affect those. I don't know what the limit is, though? You'd figure there will be trouble if you get to pressures high enough to stretch cases because you'd figure the primers would start to blow out before the case head stretched back. I just don't know where the hole size or pressure limits are?Once you have done the flashhole, the cases are done for regular reloading. Real important to remember that!