300; if you do bed the rifle into the fibermark, I recommend Brownells Steelbed. With no dye mixed in, it will come out a medium gray color. Takes about a week to get full cure, but can be worked after 6-8 hrs. Doesn't drip or run all over everything, either. If the stock is brown, it's hard to get any kind of a color match. If it has to be brown, I use Accraglas Gel.
No matter what you decide on the recoil lug, remember not to get bedding in that hole. I use a headless 1/4"-28 screwed into the hole and pushed down through the bedding compound, then clamp the action or pull the headless bolt and replace it with a bedding screw or an action screw. When you clean up the stock, be sure and clean out the pillar holes so that only the recoil lug takes recoil, not the action screws.
Let us know how it goes. Tom
Texas State Rifle Association Life Member
NRA Endowment Life Member
A big fast bullet will beat a little fast bullet every time