Recent content by gxsoon

That's over $2000 now

Continuing about my PP700 with Huma Regulator. Regulator is set at 125 bar. However, the speed starts to dropoff at 160bar. Also it is necessary to wait for 2 minutes between the shots, otherwise the speed will be lower. The heavier weight pellet tend to have more energy, JSB is more energy...

Brilliant! Indeed it is one off.

Where did you get the extra long air tube?

Thanks, I did 1) and 2) already and the maximum I got is 645fps. I backoff a little to increase shot counts. 3) I have not tried. I may increase the Huma regulator set pressure to 135bar but that may reduce my number of shots significantly

I understand different countries have different sizes. Mine is US version. Just trying to see if something else I could adjust. If my transfer port size is indeed smaller then my options are limited, unless I drill it to make it bigger. I may try a thicker O-ring

I set up mine at 125bar, adjusted the transfer port and hammer, and reached maximum 645fps with 15.9gr Normal pellets, much lower than what you are getting. Wondering what could be the difference. Maybe there is variation in transfer port size?

Great, thanks. I started at 86bar but only get 233fps on 15.9gr. spring is on loose end. I will set to 125bar to try.

Thank Matthias for the valuable work that simplify things a great deal. Which setting did you keep, 100 or 85bar? What pellet you settled on? In any case getting things done at typically 60yards is amazing.

Thanks, I see what you mean by clipping is the pellet loading mechanism clipping. I do observe that carefully of the pellet entering the barrel, seems to be clean but certainly I can try single loading it Looks may be the piston seal the primary target for problems

Also the cocking effort did not change, still very hard, does that mean the gas pressure is still on? Maybe piston seal issue?

Thanks for your thoughts. Have not thought about clipping, as it was shooting high speed before. Anyway to test for it? Gas ram losing speed would be difficult to fix as Gamo does not sell gas ram, not even piston seals. Game does offer to repair for $40+shipping both ways for a total cost of...

I know this is an old thread but I have a similar issue. My Gamo Swarm Magnum was bought 2018, initially it shoots 28fb accurately very small variation too. However, after filing for a few years I started shooting it again. Initially I still get 26fb but now it is only 22fb or less. I know it is...