Re: thoughts on RCBS priming system
I have to use Ram priming on my RCBS big press for 50 BMG. Once set up it works great but you can, as I did by mistake, set it up to not seat the primers deep enough. Whereas regular rifle cases get the primer seated to a couple of thousands below flush the 50 BMG cases need to have their huge primers seated about 20 thousands below flush. As I was not privy to this spec without great searching, I got some early reloads with primers not seated deep enough for reliable ignition. I got it now.
My point is my Dillon primer bars come pre-set by Dillon to seat primers perfectly every time. While there is an adjustment and it is covered in their instructions, I have only had to verify it and never adjust it on all the primer bars I have. The contrast is the ram priming that has to be setup every time you reload else the press is stuck in the ram priming mode. And the setup is by trial and error. I prefer the Dillon method and design (shared by others) but have no choice with the 50 BMG. Yes, I know, Dillon makes a progressive 50 BMG press but for an arm and a leg, which I can not spare.