If it wasn't a direct loading rifle like the anny, i'd say pellet in backwards. If it's a clear strike way off then apart from that, all i can think of is bad pellet... that's if it's left or right. For shots dropping well low, i'd be looking at the hammer, or on an anny, the breech seal.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep