i have read the cartridge guide a few times,,,i have loaded some h4831,,, my loads are couple grains over what everyone else uses and a little slower, 24in barrel, 140 bergers around 2885 and about 1in groups are best,,,,, waiting for some less widy and rainy days for some more testing,,,,,
Backwoods, Are you really not seeing major pressure with 53 grains of RL17? I will blow every other primer at 52.5 and absolutely wreck my brass if I don't blow the primer. Max safe load for me is 52. But I am at 3205 fps with 52 grains with ES at 1fps, and I can't complain about that/
49.7 grains with Lapua brass, 50.2 with Hornady brass of H4831SC gets me 1/2 inch groups at 200 yards. ES of around 10 velocity with a 26 inch barrel is about 2850 and 2790 with a 23.5 inch barrel. The short barrel didn't take kindly to the RL17 but it likes Hybrid 100V where the 26 inch savage doesn't. In the shorter barrel I am using 49.5 grains of Hybrid 100v with a 140 VLD and getting 1/2 inch groups at 100 and 3/4-1 inch groups at 200. All of these loads are developed with Fed 215 primers. My OAL for both rifles is 3.195 for the 130 VLD and 3.223 with the 140 VLD. Best RL17 load with the 140 is 50.8 grains. N160 seems to show some promise for accuracy but not velocity and without looking I cannot tell you what the best load with it is. I didn't do much work with it due to the fact it is not readily available around here.
That data was with 139 lapuas more toward the tangent ogive than secant, my oal with 140 bergers is 3.248" so mine has a slightly longer throat, and if I were you I'd back the neck tension off a little and toss those 215Ms for 210Ms or BR2s plus running them up that fast hinders accuracy.