Looking at building a 300 win mag. I was planing on using a bartlein 5r barrel. My question is should I use a .300 bore or a .299? The I was planning on using a 1-10 twist. Any advice would be helpful.
Generally, the 299 bore is associated with lighter projectiles like the 155.5 Berger. With a 10" twist, I would assume you are shooting heavier bullets? What are you trying to achieve?
Last edited by whitebread; 05/27/16. Reason: Spelling
