Re: hodgdon superperformance powder
I bought 8lbs. of it not too long ago. I worked up some loads with 55g Accu-tips. I loaded only 2 rounds per charge weight except for my start load.
Savage 12bvss 26" CM 12 tw PRVI case,55g Accu-tip 2.410" oal.
40.0=3427 41.5=3623 43.4=3851
40.0=3367 41.5=3613 43.4=3875
40.0=3418 42.0=3642 44.0=3975
40.0=3427 42.0=3663 44.0=3968
40.0=3418 42.6=3724 44.4=4065
40.6=3467 42.6=3755 44.4=4052
The 44.0 loads just started to show a tiny bit of flow around the firing pin,they didn't look flattened out yet just raised ever so slightly around the pin mark. the 44.4g loads were a little worse yet but didn't look too bad. At 44.4g the case was filled to about .060" below the mouth,not much room left at all and really compressed.
Only data I found was for a 60g V-Max so I just backed off the max load for that and worked it back up. I loaded up some 50g dogtowns too but have not shot them yet,also got some 69g match coming to try as well. I also loaded up some .308 with 155 A-maxes but need to go higher on charge weight to get velocity up more still had room in case for more powder and wasn't getting close to having pressure signs yet. Odds are it will be compressed pretty good to get the velocity up.
As Always start low and work it up.