Horskinator, I've been loading 357sig for quite a while, when I started Dillon was the only carbide set I could buy, and not inexpensive! When Lee came out with a crimp die, I bought one, as the seated bullet could be pushed into the case with little pressure. The Lee collet still didn't crimp tight enough, so my friend Pete machined a little more off it, and I have had no problems since! As for accuracy, I shot it for years with a USPSA club, and it is acceptable, I quit using jacketed bullets when I got a GC mold from Accurate Molds.