I make my own size dies, .4595 and .4605, I put gas checks on the 405 pb and the 500 3R.
It is all academic until you get the rifle and find the groove size.
I use LBT soft blue and Lee LA as lube and do well, no leading with pb, hb or gc.
The 405 HB is shooting very well for me , so far, I only have it up to 1350fps, it may well go bad if sent much faster, I am going to find out.
Don