I bought a Marlin XS7 stainless 7mm-08 from Whittaker's last year before season. I mounted a scope that was laying around and off to the range. The rifle shot great and I used it all season. The stock is hollow and is noisy. What is the best material to fill the stock without adding extra weight? I thought about Great Stuff Foam.

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“Go afield with a good attitude, with respect for the forest and fields in which you walk. Immerse yourself in the outdoor experience. It will cleanse your soul and make you a better person”
-Fred Bear