I have a friend that puts Co2 in his PCP rifle, and says it does not hurt anything, but did say he had to change the O rings. I was just wondering if this ok to do? He just shoots indoor silhouette at 50 feet and does not need much power. It shoots around 475-500 FPS which is plenty of power. What are your thought on this ?
Co2 in a PCP rifle
- Thread starter Frank d
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Some dual purpose guns such as the Crosman Challenger and Benjamin Maximus and Discovery are meant for dual use Co2 and HPA however they must be degassed first before changing over.
Air Force PCP guns have Co2 adapters FYI but not the RAWs.
Air Force PCP guns have Co2 adapters FYI but not the RAWs.
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Yes it's perfectly fine to do. Common Buna-N O-rings, which is the type you'll find in almost every production PCP rifle, contain CO2 well. You only need polyurethane for a location like a removable end cap because CO2 swells most types of O-rings which would prevent you from being able to reinstall it after swapping a cartridge, but of course there are no cartridges in this scenario so it's a moot point.
And since CO2 produces only about 850psi at 70F, you'll need to back off your hammer spring tension if your rifle is currently set up to operate at typical PCP pressures of 1500 - 3000psi. Otherwise it will consume a tremendous amount of CO2. That's not only wasteful but it aggravates the chilling effect which causes the pressure to gradually drop and the velocity will be affected.
And since CO2 produces only about 850psi at 70F, you'll need to back off your hammer spring tension if your rifle is currently set up to operate at typical PCP pressures of 1500 - 3000psi. Otherwise it will consume a tremendous amount of CO2. That's not only wasteful but it aggravates the chilling effect which causes the pressure to gradually drop and the velocity will be affected.
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Thanks that is what I was looking for, and thanks for the other info from everybody else, that is always good to learn new stuff.
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