and it may change again, thinking you didnt mean "5075" pellets fired which would be a good number of shots between cleaning, many barrels (some of the very best) need a bit of leading before they shoot spot on again.Your barrel very likely has micro burrs which are wearing in/out/other. How many total pellets have you fired? How many times has it been cleaned? If I had a barrel/pellet combo that shot great but only for 50-75 shots that would not work for me, couldnt live with cleaning that often (takes 60+ shots for an FT match or even sitting on the porch). A barrel that really doesnt want to be cleaned will often take 50+ shots to get back where it was. Keep shooting, keep records & keep us posted.John
That's a great target that you showed first.