Kind of curious as to how the factory detunes the .177 versions of the 78's.

I'm looking at a hpa build for one, and ideally it would be at lower pressures. I am tempted to use just the factory CO-2 tube and the brass bulk fill fitting from S&A for it. The target is the upper 400's- hopefully 470-490 with the 10 gr CR Ultra-mags.

I'm guessing that something as throttled back as that won't require a lot of volume? I won't need lengthy shot strings. The gun will be for an after work tension reliever, and high performance velocities certainly won't be a requirement...

Regards,

Doc Sharptail