Made some test loads and hit the range today.
Hodgdon book max was listed as 27.0gr H110. So, I made the following:
355gr RF-GC Matt's Bullet
26.5gr / 27.0gr / 27.5gr
My goal was 1,400 fps out of the 6.5" SBH.
Worked at 25yrds to give me the best determination as to which was the better load without human error envolved. Since I was using irons.
The first load was too slow and not accurate enough. The second was spot on in accuracy and just shy of my target velocity. The third load beat the speed at 1,414 fps but lost some of the accuracy. So, I think I'm going to go with the book max load of 27.0gr H110. It clocked 1,384 fps and grouped rather well.
Ain't nothing I'm likely to hunt I can't stop with that bullet at that speed. Gonna load up some more and try them further out next weekend or so.
The recoil is a little more brisk than I was expecting. But, amazingly, it is not bad to shoot. Pleasant even as compared to the .454 Casull in the same make gun. That sucker is painful. This one, has a decent muzzle rise but not much backwards recoil to cause pain. You just gotta hang onto the gun.
Kinda nice. I am rather pleased.