New Hornady 300 PRC brass - case neck OD

[fremont]

Just loaded three dummy rounds with 212 ELDx's and mic'd them: .3385, .3380, .3385. I had bought .333" and .334" bushings after seeing reports of .336" OD with Hornady brass. Are other folks getting anything close to my #'s?

 

[highdrum]

I'd think 0.015 neck thickness to be correct. ADG 300 prc brass is the same. You'll be fine with your bushing selection, especially if using mandrels to set final dimensions. A different twist for you to ponder. In my 300 norma improved, 30 nosler and 300wsm, I've had better luck running 4-5k nk tension versus the normal 2-2.5k. I am annealing every firing, and believe the heavier tension keeps velocity more consistent.