I recently tried the OCW method http://optimalchargeweight.embarqspa...ple/4529811475 and it works really well, I got a new model 12 in a 260 rem and was not getting good results useing ladder test, so i tried this method at 200 yards and results were great with n150 now i have to try two other powders , the link to this method says to wait 2 minutes between shots for cooling i went one minute because this larger barrel could handle it all with out being really hot to make any difference.