I've been using the Redding .357 profile crimp for about 15 years. Never lubed it or any other crimp die, never saw a need to. I use it for everything from light taper crimps on lead target ammo to full profile crimps on jacketed bullets.

Top quality die, just buy it and use it. If you want to get fussy you can oil it I guess.

The only time I've ever lubed a 357 case was when I had a wrist injury and I re-sized them with RCBS water base case lube. Huge reduction in effort there. Cleaned off after re-priming and flaring.