EDgun Leshiy 2 tuning question

[airman_o]

hi all,

I'm looking for a recommendation on the tuning of my Leshiy 2 - .22 - 350mm. I'm shooting JSB exact pellets 25.4gr.
Currently I'm using 2x 0.4mm jets, with pressure around 160 bar, shooting around 870 fps. I have the impression that my gun shoots better with higher speeds, going as high as 920 fps. Lower speeds seem to open up the groups. Before I tried 2x0.5 and 2x0.6 jets, but that doesn't change a lot (just a little less fps, more bar needed). My extreme spreads are quite low (<10 fps) with most settings, but with higher speeds they go as low as 1 or 2 fps.

Currently my gun is performing not consistently. Sometimes I shoot wonderful groups at 40m. But then it seems to degrade again after a few magazines. I also have the impression that my gun is very hold sensitive, and that it's also impacted by the place where I attach my tripod (more to the front or to the back of the gun, on the shroud).
So you have any recommendations for tuning? Or other approaches than what I'm doing now? I'd love to have an accurate tuning which just remains accurate without fuss.

 

[bigHUN]

I have great results with a .22x500 barrel, 125 bars on REPR, 2x0.7 jets. Shooting rings with RMDs up to 75 meters around 880-900 fps.
With "larger size" jets I am controlling the Dwelv.

 

[airman_o]

I have great results with a .22x500 barrel, 125 bars on REPR, 2x0.7 jets. Shooting rings with RMDs up to 75 meters around 880-900 fps.
With "larger size" jets I am controlling the Dwelv.

ok thanks for your feedback. I'm surprised actually how much fps you reach with the lowish pressure an average jet size. Also due to your longer barrel of course.
How do you determine the jet size? My thinking is that as long as fps goes up with smallers jets (lower number) I'm not blowing excess air out of the barrel. But is this reasoning correct? Or is there a better way?

 

[bigHUN]

A while back in early days I asked EW how can I minimize the aggressive air waste at the muzzle but still keep the indexing mechanizam working in optimal performance...Brian told me to play with 07 and 08 jets.
This whole summer my L2 was tuned for 18g Hades, 750 fps at 70 bars, just perfect for backyard property protection. This tune gives me close to 80-100 shots on a small CF bottle...never counted actually.
Now the squirrels season is over and I can go back to MRDs in two minutes.
But again, these all with 500 barrel length.
Edit:
The jets with larger hole keeps the valve open longer, and opposite, the smaller holes in the jets shots the valve faster.
The minimum pressure needed for indexing is minimum 60 bars if I can recall correctly.

 

[airman_o]

ok thanks for your help @bigHUN so I'll have to play a little more with pressure and jets I guess. Even with the 0.4 jets I'm not unhappy with air consumption. I can shoot about 5-6 magazines with a bottle at about 60 joule. But accuracy is not always there yet.
I started with 18gr pellets as well, and liked them. But conditions in Belgium are often quite windy, that's why I prefer a heavier pellet at a decent speed.