Well, the saga continues.
Today I tried pellets again, and the extreme spreads went from a low of 16fps for 6 shots, to over 100fps for 15 shots, most were in the 35-50 fps for es???
I'm really losing this battle. I have the hammer screw all the way in, and running it on 5, 6&7. with velocity in the 845fps for setting 5, 880fps for 6 and 900 for 7. I know it's not tuned, but my Impact was very tolerant of being de-tuned. It would be way off tune and shoot a string with an es of 4fps.
When I get time, I'm going to pull the liner and put a different one in. I have another liner for my Crown, that I know shoots very good. The liner in there now, when clean and I push a pellet through it, it is tight at the breech, then very loose in the middle, then of course the choke is tight. My Crown liner seems very consistent until you hit the choke, obviously. We shall see.
Also, next up is to remove the hammer and clean and make sure it's dry and not hanging up on anything.
I ordered a regular pellet probe, so we'll see what that does.
I checked the probe alignment, but a pin probe would seem to be more forgiving in that there is no hole to line up, you simply are ok if it is in far enough to seal on the barrel's breech oring, correct?
I will try the tune, when and if I can get the strange spreads below say 50-60 fps. With the wild spreads I'm getting, there doesn't seem to be much use in trying to tune. I mean, I've had two Impacts, a M3 and an M2 (X), and I had three or four Dreamlines, still have one, and I have a Crown, they are easy as all get out to tune. Heck most of the time, they shoot a bad tune well. Go firgure?
I'm using the standard 11.4gr hammer. HOWEVER, the previous owner had a Huma power tune hammer etc in the gun. I'm wondering if it has the extra power srping in it and that is simply overpowering the whole thing. Still it seems at minimum that it would still shoot more consistent that I'm seeing. I measured the spring and it is 56mm long, 1.4mm wire, 9.87 od and 6.96 id.
