I have two handis, one in 44 magnum, and a Huntsman. Both have first round fliers, where the first round shot will land significantly higher than any other shot. I have tried this with both clean and fouled barrels, and still the .44 will place the first shot 3"-4" high, at 50 yards. I am using 310 grain cast bullets over a maximum charge of H110 in the 44, and in a sabot over 100 grains of pyrodex in the huntsman. Both group really well once the first shot has been fired.
One morning this past year I shot two doe with the .44. The first hit high of where I aimed, the second (a half hour later) was right on.
Any suggestions?