I had put about 4 ounces of #7 birdshot in the stock of mine, but it made way too much noise. So, I took it out. I had a slip-on shock-absorbing recoil pad on it, but it made it too long for me to comfortably hold. So, I also took that off. For now, I have added mass to it by adding a slip-on side-saddle (the $5 or so one from Walmart) and loaded it with shells. I'm thinking of making a mold of the interior of the buttstock cavity, and casting some lead to fill it...any ideas?