I started with 62 gr and stopped at 68 gr, I got the data from Barnes, 69 gr is book max, if you need assistance give them a call, they are very helpfull.
68 gr Ramshot Magnum
Winchester cases
120 gr Barnes ttsx
Winchester large mag primer
Extreme spread 25 fps
Standard deviation 11 fps
Average muzzle velocity 3268 fps
Winchester Pre 64 M 70 with 26 inch barrel
Groups were running about 1 1/8 inch,by some peoples standards those groups may not be satisfactory but considering that I was getting 1 1/2 to 2 inch groups with other powder/bullet combinations that is an improvement as far as I am concerned.These loads show no signs of pressures in my rifle, but as always start low and work up, good luck.
