Hey guys ran into a little problem that I can't seem to fix. I'm loading for my 338 lapu mag. I recently aquired a Sinclair concentricity gage from another member. Well I've been checking my ammo pretty religiously with it and been impressed for the most part. All the ammo I loaded for my 284 last week had a max bullet runout of .0015 with most being under that. I'm happy with that! BTW I used forester ultra dies for that.
Moving on to the 338 I havea set of standard rcbs dies. I took all the same steps with this stuff as I always do. My bulletin runout is between .004 and .010. Not happy with that! After fl sizing I had .001 on the neck. I've checked everything I can think of. There is no "donut". I took my seater apart and cleaned everything to no avail. My cases were trimmed and chamfered. Could this really be a problem with the die? I try to look what I'm doing instead of blaming my equipment right away but at some point it has to be a possibility. Any ideas?
Moving on to the 338 I havea set of standard rcbs dies. I took all the same steps with this stuff as I always do. My bulletin runout is between .004 and .010. Not happy with that! After fl sizing I had .001 on the neck. I've checked everything I can think of. There is no "donut". I took my seater apart and cleaned everything to no avail. My cases were trimmed and chamfered. Could this really be a problem with the die? I try to look what I'm doing instead of blaming my equipment right away but at some point it has to be a possibility. Any ideas?