crimp on a pp bullet

[wgr]

any of u guys crimp your pp bullets  if so   how does it affect the pp  does it tear it  im  loading for a m236   3030   r can you get a taper crimp die  for it  also loadpp for 4570

[Black Jaque Janaviac]

I've done a roll crimp with the Lee Factory Crimp die on my .357 magnum.  However I learned real quickly that this only works if you crimp over the crimp groove.

I am thinking of having a Lee Factory Crimp die for my rifle.  Since those use a collet to "squeeze" the crimp I kinda think they'd be pretty mild on PP.