H4831 and others in that burn rate are too slow for the Absolute Hammer. Steve used RL16 with their 280 AI test rifles. Like others have stated, you need a powder in the RL16 burn rate. Steve managed to find pressure with RL16 in his testing.I get 3200 with 140 accubonds and h4831sc
Call the hammer guys. They have stated repeatedly that you will need a faster powder than what the load manuals state and that these new bullets are only for experienced hand loaders who can read pressure signs because of the lack of load data with faster powders.I have loaded a string starting at 55 grains of h4350 working up 1/2 grain at a time. Hopefully will have time this week to shoot them.