Best recent co2 bulk fill.

[Ribbonstone]

The best co2 bulk fill I’ve found in the last 10 years (even thought it isn’t marketed as such)? 

Flying Dragons XS60C PCP.

It’s been awhile since I fooled around with bulk fill (or tethered) co2 guns, but I found a ˝ full 20oz. co2 tank in my shed. 

Thought: May as well use it.

2nd thought:  This is pretty good co2 performance!   

Being a PCP made to run well from 1500psi to about 900psi (sweet spot centered at about 1200psi), it seems a natural for co2 use. CO2 has the same pressure as the lower range of the PCP sweet spot, just a “thicker” gas.

Discovery is close to this, but made to run at 1100-2000psi (centered at about 1500psi), so the co2 performance is not quite as good as the XS60C.


Shoot off:

Rifle on 1500psi air. This rifle has been detuned a bit by way of a strangled off transfer port, so the energy is down from the max of 27 foot pounds. But the shot count at 27 foot pounds was 6-7 shots inside of 4% and the 19 foot pound shot count is 19.



Rifle completely empty of air and refilled by way of a tethered to a co2 tank.  Do wonder what the energy would have been before the port got strangled down for lower PCP speeds/higher shot count.  It is summer, so I let the co2 tank come up to the ambient 92F temperature for this test.




Results for 20 shots:



Now 13.9 foot pounds doesn’t seem like a whole lot, but its pretty good for a co2 rifle.

Accuracy seems unchanged; either way, 20 shots at 20 yards is about 4/10ths.  Faster PCP tests do strike the target higher, but that’s why scope adjustments exist.





Am really tempted to dedicate this rifle to Co2, even thoug I’m not a great big fan of bulk filling. At least during the summer months, it would be more than enough “oomph” for pesting.

[Geoff]

Thanks for the comparison

[Ribbonstone]

tempted to pull the transfer port restrictor and see what it would do at the original out-the-box settings.