When loading 30-30 rounds for a lever-action, how much crimp shoud be used. The RCBS book recommends turning the seating die down until it touches the mouth of the case, then 1/8 turn more. This does not leave much of a perceived crimp. Is that enough ?? I guess one concern is the recoil causing the bullets to ease out of the cartridge, another is that some powders IE winchester, require crimp because of desired affect on powder ignition. I'm just not sure about how much crimp to apply. How does it affect accuracy?