Has anyone been able to harness the power & reduce the energy to sub 12ft/lbs successfully of these two air rifles.
I replaced the BAM's poppet spring, main spring and installed a main spring tension screw.
Reused the original poppet, although I feel iet's to big and the forces between low and high air pressure is to much.
I have reduced the air flow to plenum volume, in effect reducing air usage.
Also reduced the transfer port to 3mm, still need to test a 2.5mm TP and record difference in velocity and consistency.
Currently it's fairly accurate with 6x 10mm 5 shot groups over 20m, extreme spread is around 30fps, I'm sure there is more potential in there somewhere.
PR900W is a totally different frustration, but more of that later and will post pics.
Input from the gurus and maybe suggestions would be nice