Yeah I've done it... worked very well. What I did was get a can of "NON-expanding" foam insulation and a cup full of #2 lead shot... I inserted the straw into the butt stock right up to the grip area... I gave it a little shot of foam and then sprinkled in some lead shot, another shot of foam and some more lead shot... I kept going until the butt stock was full... it over expands some as the foam dries... wait until it is hard the trim it away with a sharp knife (I used an OLFA blade)... reinstall the recoil pad and you`re off to the races... by sprinkling in the shot, instead of inserting a sock full (etc...) the stock has much better balance and feel... the gun definitely feels more solid afterward.



























