I ran some factory 300 Weatherby ammo over the chronograph recently. Rifle is a pre64 M70 300H&H rechambered to 300 Weatherby,original 26" barrel.Very accurate rifle....the Federal 180 Nosler SB and the 180 Nosler Partition average about 3150.
The Weatherby factory 165 Nosler BT did 3413.I think this is a bit high,and suspect it is loaded pretty hot.
With these velocities,and the accuracy these loads give, I have not even bothered to handload for this rifle.
In watching a couple of friends develop handloads for their 300 RUM's I would say it is generally a faster cartridge than the Roy,but who cares. It also kicks more (to me),and if you can't get it done with a 180 gr bullet at 3150,stay home....Roy got it right in the 1940's(grin).
