Big cat, what is your barrel length? I shoot 2760 fps (with the start screen at 21 ft) with 300 gr smkhp's in my .338 x .378 with a 27 1/4" barrel, so that sounds in the ballpark. If you can shoot through an Oehler 35/35P, try that, but if the actual drop is greater than it should be, then the downrange velocity is for sure lower than you're using in the drop table. Could be muzzle velocity (chronograph reading too high) or lower B/C or both.
If you have a rifle that shoots on the drop table, try it through the chrony and see if it reads higher average velocity than the drop table velocity.
Good luck, Tom
Texas State Rifle Association Life Member
NRA Endowment Life Member
A big fast bullet will beat a little fast bullet every time