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Help with 300 ultra groups....

 
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  #22  
Old 10-08-2012, 09:21 PM
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Re: Help with 300 ultra groups....

We'll do. Good luck on your hunt mike.
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  #23  
Old 10-08-2012, 10:49 PM
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Join Date: Jun 2012
Location: Pagosa Srpings,CO
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Re: Help with 300 ultra groups....

My shooting partner and I have been tweaking factory senderos for several years now, and are still learning. But one of the most crucial must do's is torque your action bedding screws to match your load. We have wrangled some unbelieveable accuracy by doing this. Just a thought




Aim small Hit small
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  #24  
Old 10-10-2012, 06:21 PM
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Re: Help with 300 ultra groups....

Got him, high shoulder shot at 715 yards!
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  #25  
Old 10-10-2012, 06:22 PM
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Re: Help with 300 ultra groups....

Good job!!!!
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  #26  
Old 10-10-2012, 07:09 PM
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Re: Help with 300 ultra groups....

Thanks Roy!
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  #27  
Old 10-10-2012, 08:03 PM
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Re: Help with 300 ultra groups....

Congrats Mike..Nice little buck ya got there made pretty short work of that hunt haha...took your advice and had a nice chat w Roy today and got somethin put together in the near future. Thanks again roy its much appreciatedand was nice talkin with ya. Thanks again to all for their ideas and opinions. Dan
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  #28  
Old 10-10-2012, 08:57 PM
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Re: Help with 300 ultra groups....

I rebarreled a customers 300 RUM with a 26" #4 Rock Creek Sporter, 1:10, 5R, with a Harrel's Muzzle brake. The rounds are being loaded with 180 Nosler Balistic Tips or 180 Swift Scirocco II. The throat has been opened to 3.315" Thus giving the bullets a .200" jump. I shot 5 shot groups with Reloader 22, H-1000, Retumbo, H-4831SC, IMR 7828. The brass was Remington, Primers were Federal 215 GMM. I full length sized, trimmed, chamfered, anealed, and cleaned primer pockets, between reloadings. My loads with H-4831SC were sub .5moa. and the loads with Retumbo were sub 1. moa. I shot velocities between 3,150 and 3,300fps. Quite a round. I shot over 100 rounds today.

One thing I noticed with the H-4831SC was I shoot 78.5grains with 180 Scirocco in my 300 Win Mag to get 3,1150 fps. With the 300RUM I was shooting 86. grains to get basically the same velocity.

With the 300 RUM it will be nice to be able to shoot 150 grain bullets at 3,400- 3500 fps.
Nat Lambeth
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