Converting QB78 to PCP?

[Rob M]

yep thats the same as co2 pressure, matter of fact co2 can hit 1100 psi rather easily down south

[Mr. Panther]

As hot asits been in Ga., I can believe it. LOL. thanks for the info

[Rob M]

im living  in LA , was stationed in benning yrs ago , and from  nYC , so i dont adjust well lol

[SpiralGroove]

Hey Guys,
IIRC, it has been reported Co2 can reach pressures of >1600 psi when left in the Sun or Trunk on a hot day .

[rsterne]

1900 psi at 120*F for a CO2 tank properly filled to 100% by weight.... according to the US Navy....

Bob

[Mr. Panther]

So I should be safe with air regulated to 900 psi then?

[Rob M]

id go to 1100 psi personally, in GA you may as well stick with co2 in thats case, more shots , less work converting etc

[SpiralGroove]

Guys,
You can safely go to 1550 psi, just make sure the tank block is secure using various methods of "pinning the block".  There are many threads on the GTA showing how this is accomplished.

Using a set-point of 1200 to 1500 psi, you should be able to get 65 to 75 shots at 850 to 900 psi in .177 or .22 caliber.

Good Luck and be safe

[Mr. Panther]

thanks Kirk and Bob, I appreciate the information. Rob I was wanting to be able to use both with a minimal of modifications. It gets too cold in north east Georgia to use CO2 effectively in the late fall and winter, so the use of air during those months would be an enhancement. Im not looking to build a monster HPA gun, just be able to use both at a safe pressure equal to the CO2.
 

[Rob M]

in that case id do the exact same , probably get the tank from jds airman set ablout 1000 even ,which should balance out when u switch back to co2 in the summer

[rsterne]

If you want CO2 performance, then just use a standard paintball tank and regulator with an 850 psi output.... You will have slightly more velocity than with CO2....

Bob

[Ribbonstone]

Will agree with the above, 850psi is just a little bit faster than co2.  So if you aren't looking for a major power increase, can be a good solution.

The other "advantages" are that (1) you can arrange for w whole lot of shots (like +200 for a 13Ci HPA tank), (2) there is actually LESSS stress to the tank block (And all the other sealed parts) than warm weather co2, and (3) they seem to mlast a long-long time without any problems when you push them so mildly.

[Mr. Panther]

Thank you for the input sirs. That is the solution I was looking for. it is going to be a 20 yard gun mostly for fur bearing came and plinking, so the CO2 power is fine with me. I read in here that air shoots faster than CO2 so it will be like an upgrade with not too much work. CO2 is fine in the summer and spring but it is sub 60 degrees most of the time in winter and air would be a better choice I think. Great information, thanks for the time to answer my question. I'm really starting to enjoy this "Dark Side" it rounds out the whole the whole pellet rifle experience. I am currently getting into the pistol aspect of it too, or I guess the carbine aspect. I still shoot all my pellet guns every month to make sure they are operating, but seem to be gravitating more towards my CO2 guns now.