Heeman,
I called Barnes today for loading data with the 120 TSX.
H4350:
Min. 38gr./2558 fps
Max. 42gr./2780 fps.
24" barrel, Federal 210M primers.
GB
If 42 gr of H4350 is maximum with a Barnes 120 TSX, and only produces 2780 fps out of a 24" barrel -- a different powder choice is
definitely in order!
2900+ fps is very easy with Re 15 and H 414, out of a 22" barrel, without undue pressures. Each rifle is a law unto itself, and you have to work up, and all the standard caveats. But I would never trifle with H4350 in a 260 Rem if that's the best it can do.
Dennis