torquing the rifle stock


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thomis
November 17, 2010, 01:41 PM
Just curious.. how many of you torque your rifle stock to specific inch-pounds to find the best accuracy?
And what tool (make and model) torque wrench are you using?

I've been fine tuning my new .308 for months now and borrowed a friend's Seekonk torque wrench. I set the two stock screws to 30 inch pounds and my groups closed up. I'm going to set them at 35 and see if they close up further. I'm told to stop at 40 and then back down in 5 inch-pound intervals until I find the sweet spot.

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USSR
November 17, 2010, 01:50 PM
I use the Seekonk 65 inch pound T Wrench on all my Tactical/Match Rifles.

Don

brettrow
November 17, 2010, 02:24 PM
Absolutely I do. I use this, its my favorite gun tool. http://www.midwayusa.com/viewProduct/?productNumber=718023 dont forget to turn down the torque when your done.

jimmyraythomason
November 17, 2010, 02:44 PM
If you have bedded your action with a non-yeilding material such as Brownell's Glasbed and have a fully free floated barrel torquing the action won't make a tremendous amount of difference to group size. If OTOH you have pressure points along your barrel it could make drastic changes in you POI. I use a torque screw driver by Mac Tools and a torque wrench by Blue Point.I'm told to stop at 40 and then back down in 5 inch-pound intervals until I find the sweet spot Once torqued never back off unless you back WAY off and then retorque at the lower spec.

nbkky71
November 17, 2010, 02:53 PM
Another Seekonk T-handle wrench user here. 65 in/lbs on my double lug Supermatch M1A

GunTech
November 17, 2010, 02:58 PM
I ordered my Seekonk with my AICS. Simple and easy.

TonyAngel
November 17, 2010, 03:16 PM
I put an HS Precision on my 700 and HSP spec 65 in/lbs on the screws, so that's what I do. I use a 1/4" drive torque wrench with an appropriate bit.

brettrow
November 17, 2010, 03:20 PM
Yes, I do 60 inch pounds on my HS precison stock, 50 on my bell and carlson.

Soupy44
November 17, 2010, 03:23 PM
Torque will make a difference on any rifle, bedded or not. The barrel naturally vibrates when a shot is fired. Changing the torque changes the harmonics of that vibration and will have an impact on your grouping.

However, the torque which works best will be ammo specific. So if you change from one factory load to another, or even one batch of hand loads to another with a different powder, the idea torque setting will also change.

bpl
November 17, 2010, 03:28 PM
Not yet, but I recently bought that torque wrench screwdriver from Wheeler Engineering mentioned above. Anyone know how much torque is recommended for a Winchester 70 Extreme Weather in a B&C Medalist stock?

jimmyraythomason
November 17, 2010, 03:33 PM
Torque will make a difference on any rifle, bedded or not. How much will depend largely on the stock/bedding material,type of bedding(pillar,etc) Type of action,flat bottom (Mauser)or round(Win.,Rem.,etc). Torque specs aren't as important as complete,solid bedding. I torque my Mauser actions to know that the 2 action screws are EQUALLY tightened not to know how tight they are.

GunTech
November 17, 2010, 03:43 PM
Agreed. Torqued tight enough, equal and always the same is probably more important than the specific value. Although 65 in/lbs gets quoted a lot by precision stock makers.

jimmyraythomason
November 17, 2010, 03:45 PM
Although 65 in/lbs gets quoted a lot by precision stock makers. that seems to be the working number.

brettrow
November 17, 2010, 07:24 PM
I emailed bell and carlson last year for my Winchester extreme weather SS, they said 50 inch pounds for the stock.

bpl
November 18, 2010, 03:44 AM
Thanks brettrow!

Uncle Mike
November 18, 2010, 04:15 AM
Any well reputed 'dial' type t-wrench works well, and so do the 'click' type. INCH pounds only.

Be careful not to crush the wood of a wooden stock with too much torque!

brettrow
November 18, 2010, 08:58 AM
When it comes to the wheeler wrench.... Turn the dial back down when done, and I believe you are NOT supposed to un-screw with it (un-torquing, loosening). Use a different tool for un-screwing (I take the bit out of the wheeler and put it in a screwdriver), but only use it for torquing down (tightening). On a side note, I wish all companies that dealt with gun screws and bolts would switch to torx screws instead of regular old flat head scews. My burris rings I bought last year still had slot scews.

Balrog
November 18, 2010, 09:27 AM
How much difference in group size is this making for you guys?

jimmyraythomason
November 18, 2010, 10:17 AM
Be careful not to crush the wood of a wooden stock with too much torque!
This can be a problem ,however, on a Mauser action the bottom metal is in direct contact with the receiver(if properly inletted)and a certain amount of stock crush is required for a good fit. Either glasbedding or pillar bedding will eliminate wood stock damage by over torquing the action screws on other action types.

mishka
December 10, 2010, 07:04 PM
Another choice - new design of the multi torque wrench, made in the U.S.A., and optimized for work on firearms: http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2121286#Post2121286

Geno
December 10, 2010, 07:33 PM
It isn't enough just to torque the stock to the specified 65 Lbs. There is a precise means (sequence) to it as well to assure a proper return to zero when the stock is removed and returned to the barreled action.

1. Stand the stock vertical, resting on the recoil pad

2. Hang the barreled action on the stock (maintain vertical)

3. Insert the bottom metal (floor plate). Leave the magazine floor plate open.

4. Insert ONLY the front action screw. Leave the rear action screw on the table...not inserted at all.

5. With the action hanging under its own weight in the vertical stock, tighten the front action screw to 65 Lbs.

6. Insert the rear action screw, and torque it to 65 pounds. Some manufacturers call for the rear screw to be at 60 Lbs. Check the manufacturer.

This is the sequence advised to me by Stockys Stocks ( www.stockysstocks.com ) for my HS Precision and B&C stocks.

Geno

eaglesnester
December 11, 2010, 11:47 AM
Torque will be different for every brand and kind of rifle. Generally 65inchlab for synthetic stock rifles and 35inchlbs for wood stocked rifles. That's my story and Iam sticken to it.

Cheers & TIghter Groups: Eaglesnester

Offfhand
December 11, 2010, 01:16 PM
Quoted from above:

"on a Mauser action the bottom metal is in direct contact with the receiver(if properly inletted)"

Get back in touch with whoever told you that and tell him he has a lot to learn about stock inletting.

jimmyraythomason
December 11, 2010, 01:19 PM
Get back in touch with whoever told you that and tell him he has a lot to learn about stock inletting. His name is Jerry Kuhnhausen. Maybe you would like to tell him.

Vern Humphrey
December 11, 2010, 01:35 PM
My recommendation is to tork the action screws and leave the stock alone.:neener:

Offfhand
December 11, 2010, 02:21 PM
Posted from above:

"His name is Jerry Kuhnhausen. Maybe you would like to tell him."

Don't know the name, never heard of him. Does he post here?

Vern Humphrey
December 11, 2010, 02:30 PM
"His name is Jerry Kuhnhausen. Maybe you would like to tell him."
Don't know the name, never heard of him. Does he post here?
Kuhnhausen, Jerry. The Mauser Bolt Actions: A Shop Manual. VSP Publishers, 1991.

"A properly bedded Mauser receiver actually rests on steel at both mounting screw locations. Receiver mounting screws cannot compress the stock, and in turn, flex the receiver and barrel." -- Page 204

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