Cntryboy1289 was a tad high for wood. The numbers he gave are those recommended by Choate for their Ultimate Sniper and Ultimate Varmint stocks. They supply hardened socket head screws for the purpose. From Choate's information below:
"We furnish you with a new set of receiver screws. They are grade
8 Tool and Die quality hex socket machine screws. They should be
torqued to 55 to 65 inch pounds (NOT FOOT POUNDS) of torque.
Without the aluminum bedding pillars this would not be possible. Try
this in a wood or plastic stock and you will split it wide open. This high
torque assures that your rifle and new Choate stock are bolted together
until you want them apart.
For wood without aluminum pillars I think you will wind up in the 15 in-lb range. You might get as high as 20 before unhardened screws start to tear up, but you will be loading the wood with enough stress that moisture and temperature changes could start a crack. And as Choate advised, don't get a foot-pound torque wrench confused with an inch-pound wrench, or you will be torquing 12 times harder than you think! I've measured 8-12 in-lbs on a number of conventionally stocked guns I've disassembled, with only an occassional tighter one.
For maximum accuracy you can put aluminum or stainless pillars into the wood stock, get hardened screws, then apply significantly more torque.
Nick