30-06
I have a Husqvarna 1640 with a 23.5" barrel. It will shoot Winchester Super-X 165 gr. PSP's into (1) ragged hole at 100 yards. This factory load is rated at 2800 fps and over my chronograph average velocity is 2749 fps.
If you reload, I load the 150 gr. Sierra ProHunter to a little over 3000 fps with RL15 & it performs 1/2 MOA at 100 yards for 3 shot groups. Average velocity is 3016 fps.