Looking for some guidance from anyone with Huma regulator experience. I'm adding a Huma regulator to my .177 Marauder and would like suggestions for the correct set pressure to shoot 13.43g JSB's at 820 fps. Thanks.
Set your hammer spring tension to the lowest setting and find the pressure set point that your gun is shooting around 820 fps. For example, try filling your gun to about 2200 psi and see what velocities you are getting. If it's higher than 820 fps shoot it down to see exactly what pressure yields your desired velocity. Whatever that pressure, try setting your regulator to that pressure.