I've reloaded for all of the Super mag calibers, except the 414, since Gates and Dan Wesson developed them. Hands down, in my opion, is the Redding Profile Crimp die. It helped accuracy in my standard .357, and .44 loads for silhouette. And kept the bullets from pulling out under some heavy recoil in my .445 Super Mag. I shoot a 280gr. and a 330gr cast in the .445, and it worked for them. Gypsyman