Anyone have any instructions/manuals/information on regulating the barrels on a Tikka (Valmet) O/U 9.3X74R rifle. How do the adjustments work; I don't have an owner's manual for my rifle. The top barrel puts all the shots in one ragged hole; the bottom barrel shoots 2" right & 2" high. I know there are adjustments between the barrels at the muzzle and under the forearm; how do they work ? Thanks for any help.

Reduce your powder charge by a full grain and see if the two barrels dont converge.

On my over under doubles, a half grain is about an inch vertical.

Your shooting to the right is more troubling. Perhaps you need to add the special mixture of fairy dust, gremlin powder, and murphy killer, and hope that the bottom barrel comes in and down at the same time. Perhaps a bedding or stock pressure point can be checked for looseness, as well as your shooting position which can affect the two barrels differently.

let us know what happens.

I dont know about screw adjustments to regulate a 2 barrel rifle, most I have seen or heard , takes a quality gunsmith who can heat up and re solder the muzzle ends of the barrels to change point of impact. This usually requires test firing after each time, until it is right. I would get many refrences before just sending it to any gunsmith.
After all that is done , you guess'd it , rebluing the barrels. I dont have a clue as to cost , but pretty sure it's not cheap.
I could live with knowing were the second shot would be as long as it was consistent and repeated, 2" is not a whole lot considering it is not a varmint rifle.
Just my 2 sense

Frank
I am sure someone who actually has a Valmet will respond. I have not had one but I know the left/right is adjusted at the muzzle end of the bbls by the screw between the bbls. There should be some witness lines between the bbls.
The up/down is adjusted by the inclined ramp looking device under the forearm between the bbls.
I would "eyeball" and mark where everything is adjusted now and only readjust one thing at a time.
Most double rifles have the two bbls soldered together, so you adjust the ammo to "regulate" with the bbls, but one of the selling points of the Valmet system is that you can "regulate" the bbls yourself to the load you have chosen.
Another nice thing about the Valmet is that extra bbls are supposed to any frame without hand fitting.

Frank

Did it several times for my Tikkas - no big deal but you have to follow a few rules.

1) When you change something you have to shoot both barrels to check the POI because a shift in the under barrel settings will affect the over barrel. Only change one thing at a time. Then shoot both barrels. Use the correct screw-driver not to damage the screws or scratch the barrels.

2) get the height (ramp in the middle of the barrel set) adjusted first. (I guess you'll need 1/10th of an inch backwards (nearer to chambers) to push it down 2" (mybe use a thin white marker to remember where it was and to see how much you have changed it)

3) when your shots for BOTH barrels are in the same height line - adjust the sides by lightly loosening unscrewing the screw on the side where you need to move the under barrel to - then thigten the screw on the other (oposide) side to move the barrel in the desired direction. (look at the screws and change it a quater turn at a time - your height adhjustment might change after this also....).

4) after adjusting the barrels - get your scope adjusted - before you are set it is only a wast of ammo.

Hope this helps - is'nt rochet science really, but you need to do it a few times to get a feeling.

My Tikka doubles (7x65R and 9,3x74R) are shooting 1 1/2" at 100 meter for 4 shots with both barrels - doesn't matter in which order I do it.
The adjustments stay put all the time.

Franz

Frank Beller, Franz (Daydreamer), has it nailed, but one thing I might add is, if you are going to use a scope then the rifle should be adjusted with the scope on board, and if not adjust it without the scope.

It has been a long time since I've adjusted a Valmet double, and the barrels I still have are soldered in permently, for a particular load! The big mistake with the Valmet (TIKKA), is, IMO, to adjust it for a load that you will not use that much, thinking you can re-adjust it for another load when you want. The screw regulators are a nice feature, but like any double it should be set for "ONE" load that you will use, and leave it alone! I installed ribs on both sides, after the adjustments were made, to permently hold for the load I want!

Thanks for all the good information; this is exactly what I needed. Thanks, again ....... this BB is a great source for quality information.

MacD gave you good advice. My gun is not soldered but I have never changed the load after I set it. Fortunately my gun shot laterally just fine. The only adjustment was vertical. Mine has index marks for both directions I added an index mark for the proper load.