Powder for 300RUM?

rsbhunter

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Apr 3, 2006
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New Mexico
Berger 210 VLD hunting, 91.0 Retumbo.....have shot multiple groups at 500 under an inch....rsbhunter
 

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CONatureBoy

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May 19, 2021
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Colorado
I get over 3,000 fps with a Berger VLD H 210 grain using Reloder 33 in my 300 RUM (26" barrel). I used to use Reloder 25 and 26, with a little less velocity.
QuickLOAD predicts a muzzle velocity of 3,069 fps from a 300 RUM shooting a 200-grain .308 Nosler Accubond (product #54618) in front of 99.9 grains of Reloder 33, with a cartridge length of 3.598" (the SAAMI maximum), at a peak chamber pressure of 64,917 psi. Per QuickLOAD this would be the maximum safe load: 100.0 grains puts you over the SAAMI maximum peak chamber pressure of 64,977 psi. I strongly recommend you work up a load starting several grains down from that maximum load. See this thread for a broader set of 300 RUM recommendations: https://www.longrangehunting.com/threads/reloader-33-in-300-rum-data.107586/. Consider using the ladder method: https://precisionrifleblog.com/2012/07/13/creighton-audette-ladder-testing/.
 

Orange Dust

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Oct 23, 2015
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Mingo Swamp
Another powder that has not been mentioned is 8133. I really like it in my .28 and am hoping to go to it in my RUM when I run out of Retumbo. It is more available. Others are beginning to use it now and seem to like it too.
 

meatyrem

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Sep 3, 2010
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Coldwater michigan
so far I have only used H1k and have more testing to do.
I have an unused pound of RL-25 if anyone interested. I’m looking for 200AB but don’t see any available.
I have a box of 190 ABLR I would trade for 200 AB as well.
 

meatyrem

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Coldwater michigan
IMR 7977 and VV N565/568 would be good ones to try too. Along with what was stated above about 8133. But if you already have the two main go to powders and can’t find the others then you shouldn’t have trouble with either of those.
 

P7M13

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Jan 5, 2016
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Orygun
I found RE25 to be too fast in my 338 Edge, so recommend you try H1000 or Retumbo first. Let your groups decide the winner.
 

cape cove

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Mar 17, 2016
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Canada
In my 300 RUM with 180-200 gr Accubond bullets Retumbo has been the best in terms of velocity and accuracy. JME
 

Zukiester

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Aug 10, 2014
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East TX
RE-25 has worked well for me in my RUM when I couldn't find VV powders. I was in a fairly consistent temp range though when I shot.
 

jessej

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Apr 14, 2010
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224
Location
Misipi
Retumbo under 200 ABs at 3215 fps. Not a super hot load. Produces well under 1/2 moa out of a factory sendero
 

Dosh

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Aug 6, 2013
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Arizona
Would be interested in data from RL 26 in the RUM with the 210 Bergers. Thinking it ma be very near H1000.
 
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