2.5'' at what distance and supported or not?
I'm using an almost max charge of IMR-3031 behind a sierra 70gr blitzking for head/neck shots this year. It beats moa just a bit, and zeroed at 50yds it doesn't go up or down much from 25yds to 220yds. it's a up or down one inch withing two hundred gun (unless the animal is within 20yds, then it's 1 1/2" low, but when are they that close?).
good luck from me as well.