bonanza
When first testing loads for a big bore iron sighted double I shoot 4 shots right, left, right, left at 50 yards, either kneeling or sitting. Once a load shows promise I shoot it at 25 yards standing and 100 yards, again kneeling and sitting, and will shoot 6 rounds right, left, etc. I always let the bbls cool down completly between loads. In the summer this can take quite some time, and you will need a leather glove, as the bbl get HOT. The next thing I do is load 50 rounds of my perfected load and go plinking at the deer lease. That is when I test how the rifle, load, and I work together. Shoot a few deer and pigs and then "we" are ready for bigger game.