Do I need a hammer weight with a Co2 adapter?
Do I need to install a hammer weight when using the AF Co2 adapter?
Almost done with my best friends 40th b-day present, a Talon SS, with a 12″ .22 cal barrel, running on Co2. Just waiting for one of Wok’s butts (he he), and one of Subssonic’s inserts.

First session over the chrony had 15.98g JSBs flying at 500 fps. The bottle was warm enough to put out some decent pressure and I was really hoping for some more energy. Any ideas folks?
Advice? 😕
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its a hi flo with, yes, a lighter return spring, and one more less obvious difference.
the brass face bottom port(sealing surface) is larger, both allowing more room for gas to flow, but also makes the valve more difficult to open. this both raises the necessary opening force with lower gas pressure of co2, and allows the larger co2 molecule to properly flow.
me thinks that if one were inclined to open the threaded space between the seal and valve body(a la dyotat valve), you could use warm co2 to really knock the hell out of some shite.