As far as crimp goes, I have not crimped. Do check the OAL/COL (overall length) of your load. You need to have an idea how deep the throat is so that your not loading jammed into the rifling. Handi throats are usually real deep, but you never know until you check. I use a sized brass split with a dremel blade, barely seat the bullet, chamber it carefully, lock it up, carefully remove it and measure the length. Shorten it .020-.030 when you seat the bullet. I AM NOT AN EXPERT, but this works for me. Or just seat it to the specs. of the OAL for that bullet and load.