I've been through 5 drillings to date, all different rifle cartridges and I can only assume different makers. They date from just before the turn of the 20th century to 1936. I had very little difficulty finding a load that shot to the sights. As with all multi-barrel firearms I've worked with, as one barrel warms and wants to move, the other barrel(s) remain cool and want to hold it in place. Consequently, 3 shots fired fairly rapidly exhibit a tendency to begin to walk. Oddly, with all my drillings they have walked up and left.

I recently acquired another drilling in 9.3 X 72R. I expect to easily find a load for it that shoots to the sights.

In one of my drillings I installed a Krieghoff einstecklauf in 22LR, unlike luv's which is in 22 Hornet. It took me about 30 rounds to get mine sighted in but, after that it is "minute of squirrel head" at 35 yards.