have several fx guns. yours is just shooting too slow. as stated, try jsb 10.3 pellets around 890 or so.
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What about time of day? Temperature, wind, sun or shade on you or the gun? Do you notice if this has any correlation on what you are observing of the results each time you shoot? Does it shoot well for the first few shots and then when the barrel warms up it starts spraying? Maybe a particular pressure range or so many shots after a fill? Same results at the top of a fill as opposed to the bottom of the fill? Any correlation you can predict will help narrow down the culprit.
Using the same setup each time, same fill pressure, same bench, same bag placement, etc. Any of this ringing any bells?
What about weighing or head sizing the pellets? (based on your result you mentioned of seeing the pellets with good speed tracking off target line)
You probably already know this but keeping good notes on what you try and things like time of day, temperature and wind velocities along with the variations you are trying will come in handy when experimenting.
Good luck, keep us informed.
You said: "While the reg shows consistent FPS, shots that go wrong I can see the pellet flying in a different direction". (I know you meant PSI) And: "All pellets shoot just like in the pics below. 2 great groups, 4 -5 Terrible groups".
With the light at the right angle, most of us have see the pellet flight. If the velocity is consistent, and it's not your technique, Occman's Razor would indicate a mechanical problem. But WHY intermittent? If it was mechanical it would likely occur with regularity, but operator error (trigger control, differences in hold, breath control, and the list goes on), can occur randomly.
If you have other AG's and have good results, accuracy wise, then this is a mystery.
My AG experience is mostly with HW Springers. I do plan on diving in head first this fall with a FX .22 Impact along with an AV compressor and all the other "stuff". I'll be watching to see your solution.
After rereading you said something about: "All shot string from Mag 1 to Mag 12", I'm sure you looked into this, but do you have 12 different magazines? I know you did this, but... try using just one magazine (a proven good grouper) for your groups. Good luck!
have several fx guns. yours is just shooting too slow. as stated, try jsb 10.3 pellets around 890 or so.
One other suggestion I could make for you.. Try the JSB 10 grain pellets. They shoot way better than the light 8's do. My WC shoots the 10's at 905 since I turned it down a bit. That is where it is most accurate.
Crusher
Well, the weight of the pellet wouldn't really matter. It is the tune that matters. So, if you put in the 10's and have to tune it up just a bit to get 905, then yes, shot count will go down a bit. But with the 10's at 905, I get 96 shots per fill.
Crusher