Atmospherics ? You only need a 5% difference in f.p.s. to get that amount of drop. You could try adjusting the transfer port screw on the right hand side of the breach.
Baz
Hello,
i have an problem with my AA S200 .177, yesterday my power is 11.8ft/lb an today down at 10.5ft/lb ! Pressure is the same, O ring probe is good...
I dont understand.
Many thx
Atmospherics ? You only need a 5% difference in f.p.s. to get that amount of drop. You could try adjusting the transfer port screw on the right hand side of the breach.
Baz
BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD
lots of variables. i had one. loved it. but temperature would effect its output.
as Baz says there is a grub screw on the transfer port, but, check which model you have.the early were not anti tamper and could be overpowered. not good without a licence.
the screw on the bolt action could have come loose. air comes out as well as in. in that case eventually the action comes back to smack you in the face.
but, well maintained its one of best pre-charged i have had. could carry it all night. more comfortable to carry than the more expensive AA400.
the only thing i can find wrong is the nut on the steering wheel.
In France, Marc can have a rifle producing 14.75 ft.lb. without any problems.
Baz
BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD