Thread: 260rem 140gr amax any good thoughts ?

I look at the max velocity in the reloading books, not max powder weight. Most rifles have sloppier chambers and barrels compared to the universal receiver used by the reloading book authors. For the same powder weight the rifle will usually produce less pressure and hence less velocity than the universal receiver.
ADI manual lists 2730 as the max velocity with 260 and 140gr projectile and 2217 powder. Pressure is 57,000 psi. So you are probably about where you should be.