Originally Posted by Doublezranch
I do shoot the 230 targets. However, If something better on the market comes along, I'd like to try them as well. What is your suggestion on making this as accurate with the 230 as possible, but still being able to use other bullets and get them close to the lans?
You really can't plan for a bullet that doesn't exist. Best thing to do is talk it over with your smith.
IMO, the best seating configuration for a bullet is for the base of the bearing surface to be aligned with the shoulder/neck junction unless the case has a really long neck which the RUM does not. Take the bearing surface lengths of the bullets you're interested in and subtract that from the neck length. Add maybe .010 for jumt tothe lands and that should be your throat length.
You might want to throat for the shorter bullet and seat the longer one deeper if that's what you end up with. When i ordered my 300 Ultra reamer, I wasn't really interested in the 230 Hybrid. I went with .200 throat which would work very well with the 215's. as a result, i am seating the 230's about .100 into the case which isn't all bad because there will room for it and it will make for a higher fill percentage.
The Hybrids have relatively short bearing surfaces, so a bullet like the 210 Berger or 208 Amax will be able to get closer to the lands of a long throat than say the 215 Hybrid. You can also seat the shorter bullets less deep in the neck but I like to get them down to the shoulder.
It comes down to prioritizing.