I need some help determining how much clearance is required in the freebore section of the chamber. For example, if I am shooting .408" bullets, would the freebore section be best at .4085" or .409"? I have got a rifle that has the rifling that essentially starts at the case mouth and I have got to have it changed. I need more room to seat the bullets out. Also are there any thoughts on the angle of the lead? It seems that 2.5 degrees is about standard. Some guidance would be helpful.
Thanks,
SS
