Greatgrandad
Well-Known Member
I have a couple of 300 RUM's, one 26" and one 28", and I have run everything from 180 and 200 grain Nosler AB, 210 Bergers, 210 ABLR and 180 Scirocco, and after tweeking their handloads, they have all shot well. However, the 210 ABLR required more work to shoot well. I mostly run Retumbo and RL 26, and the 26" with a 180 AB with 100gr of Retumbo runs @ 3,410 fps. That throat is longer and more worn than my 28", so do not use that data in yours without working up.