Many good suggestions. May I add one.
300 Sherman….180gr Berger EH VLD at 3050fps
Yes it is basically a 30/06, 300 WSM, 300 Win Mag. IME, it fits 30-06 mags and actions, low cost and available 270Win/280AI brass, runs on somewhat available R26/N570/H1000, uses more available 30 cal bullets,
All that said is it's only real advantages are Peterson brass, chamber and reamer are a matched system; hits 300 WM velocity with 1 more round in the mag.
300 PRC is another good choice, but seems like it would have much more recoil.
Please ignore if only 300 PRC vs 300 WM are being considered or if you don't have lots of reloading experience.