I tried crimping Ballistic tips and Hornady Interbonds with the Lee Factory Crimp Die without much luck. I switched to a Hornady SST which has a canelure. A crimp into the canelure of that bullet improved the groupings of every load I tried with that bullet. I will omly crimp with the Lee crimper. It gives you far more control than useing a bullet seating die. You can certainly try crimping bullets without a canelure but be careful as a crimp will almost always raise pressure at least slightly.