Be aware that there is more in a 280. Saami pressures were set soft because of the pumps and autos. In a 24 inch model 70 I am getting 3000fps with a 150 with 7828sc. And accurate. Could an elk tell any difference between them? Probably not.Question for the guru’s. My .280 load gives 1846 FPS with 1211 ft lbs at 450 yards. I’m shooting a 160 gr partition at 2635 FPS. My 6.5x284 load gives 2092 FPS with 1360 ft lbs at 450 yards. I’m shooting. 140 gr accubond at 2873 FPS. Since the 6.5x284 has more velocity and energy should I use this for my elk hunt? I know some of you will say I need a larger caliper but this is what I have to work with. Please give me your opinions. Thanks!