best seating die?

[Ed333]

I have some 535 gr Postell bullets to try in my Browning HighWall BPCR, but I don't think my RCBS bullet seating die is going to like the shape of the nose of the Postells. Afraid it may deform the tip. Any suggestions on the best seating die to use for .45-70, using any of the more aerodynamic pointy bullets? Or am I worrying overtime?
PS- I am using a seating die at present, not just thumb pressure, because I am using smokeless powder for now, and thought it would be good to crimp the bullet. Works fine on those 300 gr flatnose HP Sierras...