I had Savage BVSS action with Walther 28" barrel with 1-8 twist, custom stock, recoil reducers, stightron 8-32 scope. Started with 44.5 grains of 4831SC with the 123 gr. A-Max and worked up to 46.3 grs. Shot Prairie Dog in WY last year at 1580 YDS witnessed by two others.
I was using 45.4 grs 4831SC with 142 gr Match Kings, but liked the velocity of the 123's better.
For short work out too 700 yds I like the 95 gr V-Max with 44.5 Varget.
But.............start low and work up, I had some funny results working up loads of case collaps on some of the lighter loads, only happened to me before with Rel. 22 on my 22-243 AI with a 1-8 twist. You know, slow burning powder.