I'm working on an old Husquvarna in 6.5 x 55 and am fighting the tighest action screws I have ever seen. Both are beyond breaking loose with a standard screw driver. Does anyone have any tricks to pop them loose. Been so long since I used my impact wrench I can't find it. Thanks, Bill.

Take a soldering iron and let it heat up thorougly. Hold the tip on the screw until light oil (3-in-1 ect.) starts to give off a little smoke.
Stop. Wait an hour. Repeat this twice more and the screws will come out easy.

If you have not already done it, put some Kroil on the screws for a couple of days. Just a drop or two. That might work without the heat.

I know 2 sure fire ways to get them out.

#1 is if You have no intention of saving the military stock

Take an oxy/acetylene torch with a 0 or 00 tip and adjust it to a soft flame. Hold the blue feather on the screw head for 5 seconds, and on the threaded end for 3 seconds Rear screw). Wait 10 seconds, and the screw will come right out. This will burn the wood around the screws some.

#2 If you want to save the stock.

Get a chunk of dry ice about the size of a large orange, break it up and pack the rear of your mauser in the dry ice, wrapping it up in foil. Wait 20 minuts. Take it out and the screws will be loose enough to get out with a well fitting screwdriver. WEAR GLOVES!

Dip the tip of your screwdriver in valve grinding compound,then use a pair of vice grips on your screw driver,it works almost every time.

WC

Before you try heat Just take a well fitting srew driver place the driver in the slots give the driver a couple of good wacks with hammer. This well work most of the time. if not heat them a abit wack them a couple of times they should come out.

Building on P Dog Shooter's input. There is a hand impact screwdriver that when struck with a hammer impacts the screw and at the same time imparts a twisting motion to loosen the screw. I have also used the soldering iron method with some success. But it needs to be a large one as there is a lot of metal to heat sink the heat away.

For the record. Soaking for a day with a rust solvent, smacking with a hammer, using grinding compond and using a wrench that fit on the hex shaft of the screwdriver did the trick. Didn't us the sodering iron. My wife wouldn't let me use hers. Thanks. The stock from the old Husquvarna 6.5 is now stripped and waiting for steam iron repairs before final hand oil finishing. As a side comment. Did you know those old Swede's are pillar bedded? Again, thanks one and all. Bill.

If the "pillar bedding" you referred to is the steel sleeve in the stock between the tang and the trigger guard, all military Mausers have that. Its there to keep from over torqueing the tang screw and springing the action.