Anyone have any good ideas for filling a synthetic rifle stock to add some weight?
I have a CVA Hunterbolt Magnum .50 muzzleloader that I just know is gonna knock the tar out of me as I start building up a hunting load.......geez that stock is light!

Here is my idea........remove the recoil pad and fill the entire stock cavity with spray foam insulation, and while still wet maybe insert a couple large stainless bolts that will sort of float in the foam when it hardens.
Should add some weight and take a bit of the bite out of what is sure to be a treat with something like 100grs of 777 behind a 295gr bullet.[][X(]

Anyone have any other suggestions before I start destroying my stock? I' d like to add maybe 1 to 1.5lbs to the finished rifle weight.