Best method for filling a hollow synthetic stock

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DA7

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I have an older Butler Creek stock for a Remington 700 that I recently did some bedding work on. Everything is working out great so far but I'm looking for tips on getting rid of that hollow sound when you tap or bump the butt of the stock. Can anyone recommend any fillers or methods?
 
Drill two holes....one to put the foam in and the other to allow the excess to escape. Trust me, a cans of spray foam is only rated at 2 pounds per square inch , but they will push outward alot. I've seen a can of foam, split seams and push walls. Uses just enough to do the job. Or just a little less,and let it expand. And do it again if required. Does a great job!!! No more hollow sound and still very lite.
 
Silicone caulking. It adds weight too. Latex silicone can be removed (with some hassle), 100% silicone is a bit harder. Works great. Only downside is the 'vinegar' smell from the acetic acid curing! may linger for quite some time.
 
handofzeus said:
Silicone caulking. It adds weight too. Latex silicone can be removed (with some hassle), 100% silicone is a bit harder. Works great. Only downside is the 'vinegar' smell from the acetic acid curing! may linger for quite some time.
Click to expand...

Thick layers of silicone might not cure properly....
If you built it up in layers, it should cure alright.
 
I also would use the expanding foam, use a waterproof type, the kind that is used on outdoor ponds is good. The nozzle may be too short, get some of that clear flexible tubing that will fit over the end of the nozzle. so you can reach all the way to the back before you pull the trigger.
 
If you use Silicone be aware the vapour could rust steel. Also, it needs air to cure. If you fill a stock completely it may never cure. And I hate to be nothing but a bringer of bad news, but here's one thing to consider: NOTHING will stick to Silicone, ever. It will also contaminate a surface so that nothing will stick to that surface, EVER! Keep this in mind when you use it on surfaces that you may want to bed or paint.
DAP makes a silicone remover compound. Works good but slow and messy. But it does work. No, WD-40 doesn't remove silicone. It just makes a bigger mess.
 
I would use two part 2-4lb polyurethane expanding foam. Or if you wanted to add a little weight, two part Poly-Tek liquid casting resin, with a foaming agent, and it would make a nice plastic shell, with a rigid foam interior.
 
quinnbrian said:
Drill two holes....one to put the foam in and the other to allow the excess to escape. Trust me, a cans of spray foam is only rated at 2 pounds per square inch , but they will push outward alot. I've seen a can of foam, split seams and push walls. Uses just enough to do the job. Or just a little less,and let it expand. And do it again if required. Does a great job!!! No more hollow sound and still very lite.
Click to expand...

Good point..
 
I've filled 2 with expanding foam. I 1st put a plastic bag inside and fold it over the stock, kinda like a garbage bin. I added some lead balls for weight. When dry cut off the overflow and there is nothing to clean up. That stuff is STICKY.
 
I know the annoyance of hollow sounding stock .. but after reading this I'd be inclined to stuff it with all those "single" cotton socks that show up after a laundry. Just keep it out of the water or it will "gain" weight pretty quickly. Other option: Newspaper would give you tinder to light a fire in a survival situation :) ...or how about a small survival kit stuffed inside??

I wonder what the big boys use.... Mcmillan??
 
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