An old trick to weight a gunstock is to use lead shot. there are a few ways a person can do this.
1. You can find and use some sort of plastic tube as close in size are the diameter as the hole int he buttstock that holds the buttstock screw. You take the plastic tube and fill it with lead shot and cap it off, you can also use duct tape to do that if the tube does not have its own cap. I tend to make them long and then if it is too off blance I can progressively cut the tube shorter until it evens out the balance of the gun. Then I stuff that tube in the buttstock hole under the buttplate of butt pad. Then I shove a tight piece of stiff foam, like they use for seat cushions etc intto the hold right behind that lead filled tube, then replace buttpad ot buttplate and there you have it.
2. for a more "Permanent" attachement of weight, you can mix some epoxy with lead shot and drill a hole in the buttstock and pour it in. But before pouring it inside which will make it pretty much permanent, I usually pour it in loose and then put my buttpalte or butt pad on to try the feel of the wieght, and even pack a gun around for a day to get a feel for how it is balanced and weighted. Then, if the wieght is correct for my liking, I mix my lead shot and expoxy and pour it down the hole I drilled out and then set the stock upside down verticly to let it dry.
A word here about drilling hole sizes. It is much easier for apparent reasons to start off drilling your holes in the buttstock small in diameter and shallow in depth while adding loose shot until you get the correct weight you want to achieve in the gun while gradually making bigger or deeper drilled holes in the stock. The holes for any particular gun might be longer in depth and smaller in diameter or the opposite, which ever works. Of course the smaller the hole the stronger the stock, sop bare that in mind while drilling also.
3. You can also just drill a hole in the buttstock where you want to weight the stock or just use the buttstock screw hole, and then just pour loose lead shot into the hole then pack a piece of stiff foam tightly into the hole so as to keep the lead shot form bouncing and shiftign around, and replace your buttpad to buttpalte.
Now as far as the front to the stock, You can use lead shot or go to a tire shop and buy some of that taped sticky-back lead they use for wheel weights.
You can take the stock off whether it be of wood or synthetic, and you might have to use a dremel tool to remove some plastic under the forearm section or anywhere in the front part of the stock under the barrel in the barrel channel, and remove amounts of wood or plastic slowly once again same as th buttstock. ( Some Synthetic stocks do not need dremeled out to do this)
Once you have done this, you just tape or lay some of the sticky wheel weight lead tape inside the barrel channel making sure it is low enough so as not to disrupt the gun barrel resting correctly in the barrel channel once the action is restocked again. You also can mix lead shot with epoxy and do it that way for a more permanent touch, or lead shot held in place with a strip of stiff foam, or get a can of that spray expanding foam and shoot a small about just covering the lead. If oyu ever wanted to removed this sprayed on foam, as most know, it readily and easily is taken off and removed.
Main thing as with most things with gun, go slow and check twice or more like Santa :wink:
Hope this gives you as well as others more ideas if not for now, then for future use. :grin:
"If it burns Gunpowder, I'm all for it" Varmintmaster