Hi guys (Happy New Yeay). I'm not new to BP but am new to mortars, I wish to make beer/soda can mortar on the lines of one I have seen on this site. I will be using it mainly to launch a fishing long line from the beach, but as a member of a BP Club here in NZ it will be used on the range on drop targets. My question is, what volume should I make the pattent breech for the powder?
Happy shooting
Happy shooting