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Stock Torque specs and Accuracy

 
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  #1  
Old 10-08-2013, 11:32 AM
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Stock Torque specs and Accuracy

A few weeks back I had taken my rifle into a gunsmith to have the riveted extractor swapped out on my .300 Win Mag Sendero. The gunsmith, who I was very impressed with, said he took the liberty of fixing a couple other things (at no extra charge) he had noticed. One of those things was tightening the stock down to 55 in/lbs. I have a McMillan Game Scout on my Sendero, and had it tightened to 45in/lbs, but he claimed for the magnum calibers it should be at 55. Having spent a little time at the range this past weekend, I wasn't shooting as tight groups as a typically do. I don't want to make excuses, and I may have been just having an off day, but it brings to light a couple questions.

Does changing the torque on the stock to action change point of impact, and do rifles have a "sweet spot" when it comes to torque that will have an effect on groups?
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Old 10-08-2013, 12:28 PM
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Re: Stock Torque specs and Accuracy

for what it's worth here is my 0.02

in an unbedded gun, one that only has recoil lug done, or a poorly bedded one I can see the bennifit of playing with torque specs to find the sweet spot. and how that can make a huge difference in accuracy and consistancy.
If a rifle is bedded correctly, or in say a aluminum chassie where all contact is metal on metal then is shouldn't matter as long as it's tight enough to stay at the same spec. Personally I don't set mine to any particular ft/lbs I crank them tight and leave them. and I have never had a problem if the gun was bedded properly.
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Old 10-08-2013, 03:56 PM
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Re: Stock Torque specs and Accuracy

Call the stock manufacturer. My old Sendero had a HS Precision stock which required 65 inch pounds. Remington stated only 45 on their website. 65 inch pounds was the accuracy spot!
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Old 10-08-2013, 07:56 PM
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Re: Stock Torque specs and Accuracy

On my twin Remington 700 Sendero SF 7mm STWs (which have been skim-bedded) they are torqued to 65 pounds. They both consistently shoot .25 - .50 MOA 3 shot groups @ 100 yards.

Here's a link to a thread on this website referring to torque recommendations:

Torque Recomendations
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Remington 700 Sendero SF 7mm STW
Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope

Remington 700 Sendero SF 7mm STW
Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope

Remington 700 LSS .257 Weatherby Magnum
Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope
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  #5  
Old 10-08-2013, 08:25 PM
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Re: Stock Torque specs and Accuracy

Thanks for the response guys. I know what McMillan recommends for torque specs, my question was more directed towards whether or not the amount of torque applied to a stock would have an effect on group size consistency? I was more after that than a specific in/lb because of what I was seeing from my groups this past weekend. I appreciate the responses!
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Old 10-08-2013, 09:34 PM
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Re: Stock Torque specs and Accuracy

Quote:
Originally Posted by BearDog View Post
Thanks for the response guys. I know what McMillan recommends for torque specs, my question was more directed towards whether or not the amount of torque applied to a stock would have an effect on group size consistency? I was more after that than a specific in/lb because of what I was seeing from my groups this past weekend. I appreciate the responses!

Each rifle/stock combination requires slightly different torque.

The best way I know to find it is to start at minimum torque (Somewhere around 40 Inch Pounds)
and increase by 5 lb increments checking accuracy as you shoot.

The torque specks for a given stock are normally Maximum and should not be exceeded.

The answer to your question is, YES. Torque can effect accuracy.

J E CUSTOM
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  #7  
Old 10-09-2013, 01:08 AM
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Re: Stock Torque specs and Accuracy

Interesting. Thanks for the advice. When I shot after it was torqued to 55 there was no change in point of impact. Is there any reason to think that easing it back to 45 will change the POI, or does the change in torque really just have an effect on harmonics?
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