QB78d long Co2 tube

[just missed]

I saw this during my search, is there a issue using this tube for Co2?

[SeanMP]

Bulk filling C02 you should see no real difference in FPS from what you have now unless you overfill it by supercooling the tube and doing a hot fill.

(Bob opened my eyes to this and it can end in disaster)

I run mine on HPA at 1600 psi in the 500fps bracket because this velocity works well for a target rifle. You do need to back off the spring and/or restrict the port to stay at 500 with HPA.

But the shot count is great even on the stock tube.