Does anyone shoot an Impact in .177cal?

Yes I do, mine is a uk spect sub12fpe model, 500mm barrel, it’s accurate enough with a high shot count but there are a lot of little rattles and twangs that’s doing my head in. I have changed the hammer spring guide, short stroked the hammer, modified the valve control knob, changes the o rings in the top blocks that support the barrel for slightly thicker ones so it grips the barrel sleeve more firmly. 38 shots in the mag is too many IMO, as the mag rotated the weight of the pellets as the mag indexes around puts a lot of force on the next pellet to be loaded



here is a 38 shot group at 30 yards, it’s accurate but not as precise as my other .177 guns

1578853437_6789174805e1b643dcbad64.57653382_D0D1B1CA-A587-4CB0-9BDC-CB31788C82B8.jpeg







 
I am looking for a impact in 177 or 20 and would like to hear all feedback as well.

Impact don’t do a .20 barrel, I have just ordered a .20 barrel blank that I will machine to fit the impact along with a probe. There are two options for the mag, contact Ddark and see if he will print one up or get a Theoben rapid .20 mag and modify that, ( it will fit, I have done it)



Bb