First time shoulder bumper
Long time lurker, first time (I think) poster.
Well, I went out and got one of those fancy rifles that have chambers so tight they require all sorts of voodoo magic to make 'em work right. It's built on a 260 Remington. I got myself some Sinclair bump gauges and according to what I've read, I need to fire a few rounds, then measure off the shoulders of the fired rounds with the bump gauge and then set up my die so that it bumps the shoulders back .002. I'm using Forster reloading dies by the way.
So, I fired some rounds, and measured them with the bump gauge and got a reading of 1.555 +/- .001. I then ran them through the re-sizer and was only able to bump them to 1.554.
The problem is, I've screwed the die body down so far that the shell holder, sitting on top of the ram, is contacting the bottom of the die. I'm still getting a fairly full length re-size (I always full length re-size), but the handle of the RCBS rockchucker is not going down as far as it used to. My question is, what do I do to insure the ram goes as far up as it should? I've been told that the bottom of the die needs to be ground off a bit. But how much? I have no tools to do this sort of thing which, I'm thinking, would require a machinist.
Your wise and experienced answers are most appreciated.