I have a bedding problem w/ HS-Precision Stock

[Teknys]

I posted in the past year about problems I've had with strings and flyers with a 243 that is in a HS-Prec stock. I've changed scopes etc.... I embarrassed to admit how many diff loads both mine and some factory I tried.

SO ... here I was tearing the gun down again and I noticed while taking the stock off that when I hold it upside down to remove the screws that when loose it falls to the right. The trigger is against the left side. I carefully supported everything level and set the stock back in place and it "rocks" to the side.
That is when I noticed that at the action screw / recoil lug area all the aluminum rub on the side of the action and the other side clean. I scrubbed clean and inspected the alum bedding and it was course and rough with ridges along the sides. It appears that it was cradling the action on the screw and the side of the metal instead of the bottom at the screw and recoil lug.

The way I see it is to glass bed or try to shape and smooth the aluminum block to cradle the action properly. I placed a shim (pop can metal) between the recoil lug and the action screw and the stock set straight and didn't try to fall to the side. I tightened up so I could hunt yesterday, but today I'm going to try and shape that block to a better fit.

If I shoot a shot every 30 seconds I can get a string that walks 4 - 6 inches over 5-6 shots. If I wait 3 minutes between shots I "almost" get one hole for 3 shots. This tells me something is "walking" and due to heat/recoil/ ? ....

 

[Elkman]

It sounds to me like you have found the problem. It does sound like a "heating up " issues. There may be more but that one, does need correcting. I cn't picture exactly what you are seeing but it sounds like a careful bedding/or sanding job may help it. !! Let us know !

 

[Teknys]

I'll post a couple of pics later today when I take the stock off. I know it is hard to explain and then visualize what I'm seeing.

 

[Oldtrader3]

That edge burr sounds like it would cause the rifle to shoot strings from heating up for sure. Pictures would help, although your description describes the problem pretty clearly.

 

[BK]

I've read that even with the Aluminum bedding block, you still want to skim-bed the stock, what with tolerances in the stock possibly working against tolerances in the action.

My M70 EW .300 WSM has the bedding block stock, and when I get around to working with it, I'll probably give it a try as-as, then skim bed it if it doesn't meet my expectations.

 

[SJB358]

Same here. I have the Medalist on my 338WM. I will eventually skim it also. It has a tendency for the screws to back out with prolonged firing (after 30-50 rounds). I think the dissimilar metals kinda make this happen a little faster. I am thinking with a little bedding in there, it might stop that from happening as often. Scotty

 

[Woodycreek]

Had to skim bed my H&S on the 300RUM Sendero to stop vertical stringing. Works like a champ now.

 

[BK]

Same here. I have the Medalist on my 338WM. I will eventually skim it also. It has a tendency for the screws to back out with prolonged firing (after 30-50 rounds). I think the dissimilar metals kinda make this happen a little faster. I am thinking with a little bedding in there, it might stop that from happening as often. Scotty

Ugh. 50 rounds of .338. No thanks.

 

[Woodycreek]

Same here. I have the Medalist on my 338WM. I will eventually skim it also. It has a tendency for the screws to back out with prolonged firing (after 30-50 rounds). I think the dissimilar metals kinda make this happen a little faster. I am thinking with a little bedding in there, it might stop that from happening as often. Scotty

Ugh. 50 rounds of .338. No thanks.

Scotty's 338 Win Mag is fun to shoot. Very little recoil with the brake.

 

[CAhunter]

A simple skim bed will probably cure your problem. Make sure to clean the aluminum very well and bed. Also once bedded you can check to make sure the barrel channel is fully floated.

 

[Antelope_Sniper]

Actions with a large flat surface such as a M70 need to be skim bedded, even with an aluminum bedding block. A round action like a Rem 700 will seat into the bedding block better then the flat actions. It's just another reason the bench shooters prefer the 700.