Ok, here's my experience with my rig, 24" with modified 98 Mauser action, tapered barrel. I use 135grn SMK, with Match Federal Primers GM210M, and Winchester brass. My rig likes 2900ft/sec speeds with 1:11 twist, and these loads are what I run with for accuracy (1/2" MOA):
1) H1000, at 59.9 grns...