I'm not really new to handloading, having hand loaded a lot for my S&W 500 ...but for the 500, I always did the crimping and seating in two separate steps, e.g. seat a bullet in each case, then separately crimp each one. The "trial and error" nature of seating and crimping in a single step scared me away from doing it that way. But now I'm about to build a bunch of .38 Spl and .357 Mag rounds, and a crimp is recommended. My Redding die set comes with a profile crimp that I plan to use. OK ...my question:
As I understand it, the 'perfect' adjustment on the die slides the bullet the last few thousandths into the case right as the die forces the crimp on the case, kind of in unison, right? I wouldn't mind saving the extra step if this isn't too hard to set up, results in accurate LOAs, and has no downside risks in things like accuracy. I'm writing here to get feedback on why it might be better to seat and crimp in a single action, or to seat and crimp separately like I'm used to doing. I read in another forum that the Redding Profile Crimp does indeed shorten the LOA as it crimps, even if the bullet was seated to the correct LOA prior to crimping ...you have to back off the seater so it seats slightly long, and tune the seating until the crimping produces the correct LOA. Someone else said that doing the 2 steps separately improves accuracy. I'm confused ...Got many experts here ...what do you recommend??