Which PCP guns are favorable for using CO2?

[cvicisso]

I originally bought my Talon-SS as a CO2 gun and later added the HPA tank.
It has seen very little use on HPA as it is a bear to fill to full 3k pressure with a hand pump.    But there is no "rule" that says I can't stop at 2.5k...   
I thought about the spin-lock tank and the only advantage I can see is the availability of a gauge, which the standard tank lacks.   The ability to fill on the gun doesn't really matter to me, as removing the tank to fill is a simple operation.   

So the Spin-Loc tank just adds a gauge and a fill port? The 'tank-to-receiver-fitting' is the same? I assume I'll still need the AF CO2 adapter to fit my 12 oz tank on there, right?

I have a Disco with a 'short' tko and its length makes me feel like I'm swinging a Kentucky rifle muzzle loader.   

That's what my Gauntlet felt like.

The Talon-SS benefits from the installation of a strap-on WOK-Butt, which I have.

I'll Google that - looks nice.
Thanks!

[Ribbonstone]

I do not have any non-regulated PCP's that I haven't tried co2 in.  I balk at running co2 though an HPA regulator, but even though it is "forbidden" by most makers, have tried it in every non-regulated PCP I have. 

It is possible the maker used O-rings that are "allergic" to co2 and might swell or even "crackle" with it'suse...I just haven;'t come across any that didn't go back to working normal with air after a short to even season long use of co2.  The valve stems are likely either Delrin or Teflon, neither of which seem to give a "hoot".


BUT the only real "wins" have been with the PCP's produced or tuned to LOW PRESSURES (like 2K Disco/Maxi/Beeman Chief) or the HPA bottle rifles tuned to about 1000-1100 PSi with the BOTTLES REMOVED and small co2 tanks attached.


YOu'll generally lost 1/3 the energy at best...and 2/3rds the energy at worst....but can gain a whole lot of shots.

Of course, you could dedicate a PCP to co2 and readjust/retune everything to work it's best with co2 and get more performance....but it won't be "dual gas" as it will be a way out of tune for air.



With non regulated PCP's, can figure soemthing like bulk filling 1 ounce of co2 for each 42-43cc's of air volume (which puts them on the same ratio of air-to-cow as paintball tanks).  So somthing like a Dico can hold a max. fill of about 3.1-3.2 ounces of co2 (and we can have a whole 'nuter discussion about how to get a max fill).


So far, the best results (without any re-tuning away from it's air settings) has been with the LOWEST pressure PCP's.  Disco/Maxi/Chief all run at 2K with air.  The Flying Dragons PCP runs at 1500 psi with air.  They've all done quite well with co2.

[cvicisso]

BUT the only real "wins" have been with the PCP's produced or tuned to LOW PRESSURES (like 2K Disco/Maxi/Beeman Chief) or the HPA bottle rifles tuned to about 1000-1100 PSi with the BOTTLES REMOVED and small co2 tanks attached.

This is great (and encouraging!) info! Thanks! Is there an easy way to look up what the various HPA bottle rifles are tuned to?

[Ol'DeadEye]

I originally bought my Talon-SS as a CO2 gun and later added the HPA tank.
It has seen very little use on HPA as it is a bear to fill to full 3k pressure with a hand pump.    But there is no "rule" that says I can't stop at 2.5k...   
I thought about the spin-lock tank and the only advantage I can see is the availability of a gauge, which the standard tank lacks.   The ability to fill on the gun doesn't really matter to me, as removing the tank to fill is a simple operation.   

So the Spin-Loc tank just adds a gauge and a fill port? The 'tank-to-receiver-fitting' is the same? I assume I'll still need the AF CO2 adapter to fit my 12 oz tank on there, right?

I don't have and have never seen a SpinLock tank in the flesh, but I believe the threaded insert in the frame needs to be replaced with the spinlock part.   Then the spinlock tank can be clamped into it.    Don't know how the co2 adapter fits in that assembly.    Maybe someone with personal knowledge will pipe in...
Part # 4 in the photo...
I have thought of installing a TalonTunes tank adapter which will lower the tank height by 3/4" to 1" and providing a fill port and gauge.   Just more money to spend that I don't really need.   But I may want it in the future....  The rifle needs to be slightly modified for its use.   Maybe someday...
 http://talontunes.com/shop/talon-tunes-tank-adapter/

[Ribbonstone]

Only two air guns are sold as running on HPA bottles.  The Gautlet and the Pyarmid Air conversions. Both seem to run no9n something like 1100-1200psi, and both are a bit of an iar hog as issued.  So wapping a small co2 tank is likely to show significant drop in power (lets say 1/3 to 1/2 the energy per shot)….worse if the air system is tuned to the max.....maybe better if the air system is tuned to low speeds.

Don't have a Gauntlet....do have a couple of self converted tyo HPA QB's...as I run the HPA Qb's at only 850psi, the difference between swapping an HPA tanki and a CO2 tank isn't all that much.  Not enough to retune, although the co2 is SLOWER than the HPA even if they are near the same pressure (basically, co2 is "thick" while air is "thin").


As for the Talon, when I bought my SS, it came with a "free" Co2 adaptor, and I used it most often with a co2 tank attached.   Short barrel in the SS, so it pretty well maxed out at about 13-15 foot pounds (in 5mm) but is sure gave a whole lot of shots per 9oz co2 tank,  Actually, the gas use was kind of wastefull at that level, but were so many shots per 9oz tank, I didn't much care.