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Powder Choices for 7mm STW

 
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  #8  
Old 07-29-2012, 10:23 PM
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Join Date: Jul 2012
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Re: Powder Choices for 7mm STW

Hi Dano,
I'm using 81.5gr's of Vihtavuori N570, 160gr Accubond & WLRM primers at 3.65"oal. I did all of my work up at 250M's and my average grouping is 1.75". I'm averaging 3100fps with this load. I've had it up to 3300fps but thats MAX+. I'm shooting a Ruger #1B ss 26" barrel rifle. I'm happy with this powder but I'm not sure of it's temp sensitivity. It gave me better accuracy and velocity than Retumbo. The other two powders I'm interested in is RL-25 & H 1000. My hunting buddy uses 180gr Berger VLD's in his 7mm RUM with ? 91.0gr's of Retumbo and that works real well for him. I think he was getting 2950fps +/-. But as far as I'm concerned I'll stick with VVN 570 for 160gr and heavier bullets to start with anyway in the 7mm STW.
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  #9  
Old 07-29-2012, 10:45 PM
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Join Date: Dec 2006
Location: New Mexico
Posts: 1,501
Re: Powder Choices for 7mm STW

Dano, I just shot the 180 Berger Hyb this am in my STW using 76 grains of Retumbo. Grouped about 5/8" 4 shots. I plan to work more with this load. My STW has been very stubborn with load development. I still have not found a load I like yet, but I am still trying. My 7 WSM loves H-1000 with 180 Berger VLD's and 168 VLD's with H-4831 sc.
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  #10  
Old 07-30-2012, 12:06 AM
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Join Date: Dec 2008
Location: Idaho Falls, Idaho
Posts: 528
Re: Powder Choices for 7mm STW

dchamp & Capt Academy,

So far I've tried Retumbo, H1000, and US-869 with the 180g Berger VLDs. And The US-869 was definately not the way to go. It's too Slow and I got no accuracy what so ever out of it. H-1000 Was ok, Groups about 1" at 100yds, But Retumbo actually won the accuracy contest.

Powder Choices for 7mm STW-img_20120423_201813.jpg

The 2 Flyers were my doing, When I had shot this group, I had been shooting for several hours and Shooter fatigue was setting in..... Still a good 3 shot group.

This was with 79g of Retumbo and velocity is 2989fps 10 shot average.

The rifle also has had a face lift, I found a used H-S precision stock and It definately looks better, and shoots better as well.

Powder Choices for 7mm STW-img_20120604_101739.jpg

I would try the Vhitvori Powders, but the local source for it has dried up.... I'll start messing with the bullet seating depth from here on.

I'm planning on a 150-168g Class load for this rifle as a secondary close hunting load, and I'm leaning toward H-1000 as the powder of choice.

I appreciate your imput.

Later guys,

Dan
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  #11  
Old 07-30-2012, 05:46 AM
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Join Date: Feb 2012
Posts: 789
Re: Powder Choices for 7mm STW

the load ive settled one with mine uses 7828sc. It might now be slow enough to give the absolute best top end velocitys but its sure accurate.
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  #12  
Old 08-01-2012, 07:13 AM
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Location: New Mexico
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Re: Powder Choices for 7mm STW

lloydsmale, what bullet are you shooting?
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  #13  
Old 08-01-2012, 09:47 AM
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Join Date: Feb 2012
Posts: 789
Re: Powder Choices for 7mm STW

150 ballistic tip.
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  #14  
Old 08-01-2012, 03:09 PM
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Join Date: Nov 2008
Location: Norway
Posts: 17
Re: Powder Choices for 7mm STW

My current reload is made by 71.6gr VV N165, 180 gr Berger VLD and a Fed 215 primer. COL 3,94" (10.0mm)
This load have a 3 shot average speed of 3009 f/sec.

Accuracy at 100 meters: 3 shot @12mm (0.5"). 3 shot at 400 meters 68mm (2.67")

I bought two boxes of VV N170 some time ago, but my reload with N165 is so good I have not experimented with any other power this year.
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