338 RUM velocity estimates

[montana_native]

Just wondering if anyone could give me some ball park velocity estimates on a 338 RUM with 28" barrel, 1:9.5 twist with H-1000 and/or Retumbo

250 gr Accubond
and of course the 300 SMK

Thank you.

 

[Long Time Long Ranger]

2775-2825 fps with the 300 SMK and 3075-3125 fps with the 250.

 

[royinidaho]

I'll agree with LTLR's estimates. I'd lean towards the high side of the estimates as 28" it 2" longer than the barrel on mine.

91.2 gr Retumbo gives me about 2750 FPS MV @ 50*F.

 

[wildworks]

i get 2750 fps out of my 28 sendero ss fluted and 300 smk. with 74.5 gr retumbo.