Shooting just one gun REALLY makes a difference. I shot the trail one whole fall, winter and spring, every weekend except for 2 of them, with my 14 bore rifle.
At Rendezvous B.C. that following fall I placed first in every event (7 IIRC) except for the 8th, the long range ctg. match. I placed in the middle in that one, round
balls, of course. I went through 25 pounds of powder, that 3/4's of one year.