Here’s a recipe that I’ve used with success. 12 ga. Underhammer with jug choke (Caywood). 70 grn Swiss FFG, 1 12ga wool wad followed by 50 grn of corn meal, 1 1/4 oz copper plate #6 finished with an over shot card. Target was shot by a buddy that just had to try it. 18 yards and 25 yards.