What cartridge are you using? It looks like a short action?
Anyways...I have a 270Wby with a stock chamber, 1-9 Benchmark barrel. Freebore is .376". I can load to any COAL that I want. No accuracy issues...get as much freebore that you can stand, so you are not limited to one bullet. Look at the limiting issue of the longest COAL of your magazine. Then go from there...
I need a reamer regardless. my brother is my smith so I'll just be giving them as part of my payment for the build. may as well have the throat set up to get the most of the bullets I expect to shoot.
