See, I almost got into a deck gun back in about 1985 or so. Another gun guy and I attended an auction and started bidding on it, decided against it as we'd be looking at trouble eventually. We'd have HAD to shoot it. It took a 1 pound ball as I remember...and we lived at a base out in the prairies. This would be the same...you gotta wring it out. Use down-rigger balls from a local fishing supply or cast from old plumbing lead.