piper: interestingly, all ithaca double guns had different sized frames, depending on gauge...sadly, have seen too many of them with stock cracks behind the top tang, often caused by shooting post ww2 high pressure, heavy recoiling ammo...nitro specials are well designed and reliable shooters, so long as one keeps loads light and screws tight...and another thing, dry firing a nitro without snap caps often results in a broken firing pin, which is impossible to replace without a special jig...

keep it simple and keep it safe...