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300RUM powder choices

 
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  #8  
Old 08-15-2006, 02:53 AM
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Join Date: Jan 2006
Location: South Africa
Posts: 420
Re: 300RUM powder choices

Guys, sorry to put a post here thats irrelevant to anyone other than a South African. But in case there are a few of us lurking here (I know of 3!).....

I've tried to order poweder. I even tried arranging to ship powder from Namibia to the US - it's prohibitively expensive to ship due to current restictions and requirements.

Scoops - S385 seems slower than IMR4831 to me. Accordingly it may be worth a shot (excuse the pun). The guys from SA Reloaders load S365 and S385 in duplex to approximate IMR4831, which bears me out. I know someone who uses S385 in his .338 Lapua. I'll pop you details.

B12/7 was designed for the 50 BMG, I'm told. Somchem claims you can use it with great success in the .338 Lapua.

This is an old exerpt from the Q&A on Somchem's website that I had saved (this part of the site hasn't been active for at least 8 months). Call me anal, but you never know when you'll need this stuff! [img]/ubbthreads/images/graemlins/wink.gif[/img]

"S385 is very similar to IMR4831.You can use data published for IMR4831 as guideline."

Also:

"You can also contact Somchem for a slower burning powder B127/0. This powder can be used at maximum loading densities without any pressure problems.Regards- Johan Loubser".

I understand Johan is now with Accurate Arms / Western Powders - now part of the same group. He was always helpful when he was in SA. I'm told if you track him down in the US you can still pester him!

Have you tried Manie Johannes at Somchem?

Hope this helps a little. I'm pleased you are doing all this work so that I can have it easy if (when) I rebarrel my 300 WM to 300 UM [img]/ubbthreads/images/graemlins/grin.gif[/img]

Wim
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  #9  
Old 08-15-2006, 02:54 AM
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Join Date: Jan 2006
Location: South Africa
Posts: 420
Re: 300RUM powder choices

Sorry, should add Somchem's response re B127 was to a question regarding the .338 Lapua.

WL
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  #10  
Old 08-17-2006, 12:28 PM
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Join Date: Jun 2006
Location: Memphis, TN. Soon to be Casper, WY.
Posts: 494
Re: 300RUM powder choices

2scoops,
Sierra starts at 75.9 and goes to 83.0 of H4831SC for the 200g SMK velocities from 2700 to 3000.
70.3 to 77.0 H4831SC for the 220 SMK velocities from 2600 to 2800.
This is according to Sierra's Infinity 5 software.
Hope it helps.
__________________
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  #11  
Old 08-20-2006, 10:49 AM
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Join Date: Jan 2006
Posts: 4
Re: 300RUM powder choices

I have used 81gr. IMR 4350 and 200 gr. accubonds, fed 215 primer. Shoots moa or better out of a 1917 enfield rechambered to 300 rum. Don't know the velocity.
jim
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  #12  
Old 08-23-2006, 06:53 PM
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Join Date: Nov 2005
Location: Mississippi
Posts: 33
Re: 300RUM powder choices

I use both powders and they both work flawlessly, I have loads for a 200 gr nos partition with both loads being over the 3000 fps mark, as a matter of fact they are both listed as tested powders with the nosler 200 and 22o in noslers 5th edition....
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  #13  
Old 08-23-2006, 06:53 PM
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Join Date: Nov 2005
Location: Mississippi
Posts: 33
Re: 300RUM powder choices

I use both powders and they both work flawlessly, I have loads for a 200 gr nos partition with both loads being over the 3000 fps mark, as a matter of fact they are both listed as tested powders with the nosler 200 and 220 in noslers 5th edition....
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