No Sabot 1 can of concrete and 150 grains.
I learned this from DD and you can see in my video that combo works very well . Also its cheaper, no special concrete stuff to buy., no sabot to make., no 7 lbs of lead ., no broken gun., and can be done soon., and cheap., on less powder. Dont knock it till ya tried it :thumbsup: Good Luck Heinrick and please post results photos and video., that mortar of yours is a beautiful piece.