After the polishing w/ Mothers, finished up the cleaning with (two rounds of passes w. JB Bore paste, Hopes #9 until I got a clean patch and finally a patch w/ Kroil. The bore cleaned up nicely. Of course the "pits is pits" are still there but the rifling and the rest of the bore looked a lot better than before. I slugged the bore and got readings of .300-.301, and .309-.310; cleaned the rifle again to remove any lead residue. I worked up some loads using Sierra .308 165 BTSP GK and Sierra .311 180gr SPT PH. Took the M39 for a Spin on Saturday. Best groups were 1 5/16" and 1 1/4" respectfully. I'm going to try the .311 174 HPBT MK next and maybe the .308 175 HPBT MK Did the Fins just wrap the barrel at the muzzle or did they have some upward pressure?