bwinters===== I had a Ruger 30-06 ultralight rebored to 9.3 . the original muzzle O.D. diameter was .500, and still is. The rifle is a pleasure to carry all day elk hunting and the bull elk I've taken with the 325gr Norma oryx bullet reacted as though they we hit by a train. I don't believe there is a production gun with a slimmer contour barrel than the Ruger RL . Send your rifle to JES reboring in Oregon 4 lands, 1in 12 twist, you won't be disappointed in the accuracy or results on critters for a non belted cartridge.
Good Hunting
Lj