Lee used to claim the least run out of any dies, and i believe this was and may still be true, but everyone doesn't shoot varmint caliber rifles, and accuracy, in an absolute sense, isn't everything. I wouldn't want to get a bullet stuck in the chamber of my 458 because of a poor grip on the bullet. I wouldn't want to have the bullet set back after firing several rounds and having the bullet on the cartridge in the bottom of the magazine get shortened up by battering in the magazine either. Both situations could cost you your life; not a good trade for even two moa of accuracy. I usualy keep two sets of dies for my 243, and 7mm mag, one for varmint loads, and one for game. Taper crimp varmint/target bullets/loads, and roll crimp game loads.Saves set up time, too.