Never found anything that I remember in a gun butt, but I found a pack of matches in the handle of a used bicycle I bought as a kid. I saw a plain Flues 20ga at an aution in great shape, but the wood finish was crinkled all over. It was very light and had me guessing as to its weight. 5.5lbs may have been it? It went for $500.00, but then there was a boxed WC Scott sidelock gun with two sets of barrels that went for $950!