Free: Contests & Raffles.
I've never shot factory ammo out of either of my .300WM's but I'd go with Federal Premium and 165 gr TTSX if I were buying factory. Works good elk, deer, bear, pretty much anything.
For big game Federal Premium 165gr. Nosler Partition.
I like heavy bullets if they're the standard lead type, but with a copper bullet like the Barnes I wouldn't be afraid to go as low as a 150 in the 300 Mag, especially if it was to be used only for deer sized animals.Recoil would definitely be noticeably less than a 180.
I have the long range scope from best of the west, so I have to use their system. 190 grain berger, around 80.00 a box