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7 saum and h50bmg??

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Old 03-05-2014, 09:45 AM
Junior Member
Join Date: Mar 2012
Posts: 24
7 saum and h50bmg??

I am gonna start reloading for my 7 saum, and pretty much the only powder I can find is H50bmg. Now one of the recommended caliber for that powder is the 7 ultra mag. In my mind, I would the that the 7 short action ultra mag should get along with this powder too but I can't find anyone that has tried it. What of you guys think?
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Old 03-05-2014, 09:57 AM
Bronze Member
Join Date: May 2011
Location: Gillette, Wy
Posts: 82
Re: 7 saum and h50bmg??

You'll never get enough powder in the case for any performance. Back down to H1000, IMR 7828, N570 range.

You should list where you're located, a lot of people will help out locally. RL 25 is another good powder for 180 class bullets, and was just available yesterday. I'm on my 5th saum, and I don't agree with the guys running H4350, and 4831, too fast in my opinion.
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Old 03-05-2014, 07:24 PM
Silver Member
Join Date: Feb 2013
Location: SW Alaska
Posts: 131
Re: 7 saum and h50bmg??

My SAUM burns Retumbo well behind a 175 A-Frame in a 24" 700. 2850 with no pressure.

Confucius say, "He who go to bed with itchy butt, wake up to smelly finga."
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Old 03-05-2014, 10:19 PM
Junior Member
Join Date: Mar 2012
Posts: 24
Re: 7 saum and h50bmg??

I am from Big Timber, MT. Powder doesn't show up too often here. I would like to try retumbo or h-1000 in it... 26 inch barrel with 180g Berger hybrids is the plan...
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Old 03-06-2014, 11:15 PM
Silver Member
Join Date: May 2010
Posts: 267
Re: 7 saum and h50bmg??

I agree with Milo on H4350 and H4831 being to fast for the saum with 180's. I have tried H4831, H1000, Ramshot Magnum, and Retumbo. Got some weird pressure signs with H4831, therefor I dropped that powder. H1000 and Retumbo worked really well.

My currently load is Retumbo, 180 hybrids, and Norma brass. All through a 24" barrel and 2900 fps. They are loaded for a long action and has a col @ 3.050". If I was going to try other powders, I would look at RL-25 or 7828SSC
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Old 03-08-2014, 05:50 AM
Platinum Member
Join Date: Dec 2005
Location: Tucson Az
Posts: 1,264
Re: 7 saum and h50bmg??

I once used IMR 7828 with a 7-08. It was a compressed load with a 140 gr bullet. Velocity was around 2200 fps and was very accurate. I suppose if you keep the case full it would shoot but don't expect much for velocity. Use a magnum primer and give it a try.

I remember my friend's father talking about the days when they used the old H4831 surplus powder. They use do dunk a 30-06 case into the powder and scrape across the top of the case with a knife then seat a bullet. Not very precise but he said they got good accuracy and the powder was very inexpensive.
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