Tuning Turning a Co2 pistol into PCP, is it safe to operate with a 1000PSI regulator?

I have modified allot of Co2 guns, over the years, for higher power. I would have no problem running a Co2 gun on 1000psi of air. I ran them far higher with safety mods that included securing the valve in the gun much better. Still these guns were steel. With a composite gun I would be checking to see how the parts are doing even with the slight increase in power. I would expect them to be fine.

That being said some of the plastic Macro-lines are only rated for 850psi, and some have trouble with that, although you can get better line. The Macro-line I am using is posed to be good to 2500psi although I don't use it over 1500psi.





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Generally speaking, yes 1000psi air in a CO2 system is safe. Reason being, CO2 is very temperature sensitive and can reach pressures of 1500psi or so on a hot day (for example, a rifle left out in the sun), meaning any properly designed CO2 system will be fine at some lesser pressure.

However bear in mind that regulators can and do fail so you want a 1.8k burst disk for safety. That is the burst disk rating on a paintball tank but double check to make sure because some will have a 3k.

nervoustrig said:

Generally speaking, yes 1000psi air in a CO2 system is safe. Reason being, CO2 is very temperature sensitive and can reach pressures of 1500psi or so on a hot day (for example, a rifle left out in the sun), meaning any properly designed CO2 system will be fine at some lesser pressure.

However bear in mind that regulators can and do fail so you want a 1.8k burst disk for safety. That is the burst disk rating on a paintball tank but double check to make sure because some will have a 3k.

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i have been wanting to mod my crosman 1077 to pcp because its all steel and metal internals do you think its possible to regulate it to 2200 psi or do you think its too dangerous?

At a 1000psi how many shots are you going to get? I would think you are better off staying with the cartridges.

I shoot a modified chaser with a jds airman drop block with a first strike hero reg With 15 ci 4500psi cf bottle supposed to be 1100 psi for couple years now.
I'll see if I can find a pix.

Top gun my bandit and bottom is my chaser. Going to do a shot count on it soon. I expect it to do 500+ crosman 7.9 HP.

Anything is possible with the right parts.



This was a 2240 I built into a pcp bottle gun. Regulator was around 1100 psi IIRC and it was doing 700 fps with 7.9s out of the 10" LW barrel. Over 100 shots on a 4000 psi fill in the 350cc bottle.

I scrapped almost all my crosman stuff that had drop down blocks and went Artemis when I found out the block would fit the bandit and chaser air tubes. Had a better trigger set up. All my crosman pistol stuff had marauder p rod triggers with walnut thumb shelf grips. Seems I bought 3 sets of trigger only have 1 left.

miksatx said:

I scrapped almost all my crosman stuff that had drop down blocks and went Artemis when I found out the block would fit the bandit and chaser air tubes. Had a better trigger set up. All my crosman pistol stuff had marauder p rod triggers with walnut thumb shelf grips. Seems I bought 3 sets of trigger only have 1 left.

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That one I posted I sold to a member here about a year ago. It had a Prod trigger as well.

The only crosman/Benji gun I have now is a stock Prod in a Airgun Revisions stock.

Sold my p rod in 2014 what it look like when sold.

I wouldn’t be bothered at all running it at 1000 psi. That’s still a normal CO2 pressure on a hot day. I wouldn’t think you were nuts even at 1200 psi.

Once you start getting into those 1800 psi pressures however you ought to be treating it like a test gun, wearing protective gear and charging and firing it from behind a baricade. At that point you’re getting to where a catastrophic failure or a valve lock is likely.

It might be worth it to find out what its limits are though and if possible I’d approach it slowly so as to avoid a valve lock. It would really suck to have your gun seized up with a dangerously high charge of air in it and no good way to let it out.

Savagefox said:

Hi lads, I want to turn the HDR.50 Into PCP.

I locate more or less the apropiate parts, Puting a remote line and carriyng a bottle is enough like in some paintball guns.

Here's the doubt. The safest would be to order the 850 PSI regulator, Co2 runs at a 800 PSI nominal.. but I'm really tempted to purchase the 1000 PSI reg from what this gun can benefit greatly, specially with the block piece removed and valve pin shortened.



I know the Co2 pressure varies greatly with temperatures, I just don't know if 1000 PSI is under tolerable margins, or I may blow something and the remote line are gonna whip dangerously with a metal scrap attached on one end and my body to the other.

Co2 experts?

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Let’s begin with safety first
Unless the people you are getting responses from know the engineering specs of the specific materials in use
You’re asking for a injury or worse
Mechanical deflagration can end your life just as quickly as a bullet
Such risk is seldom worth the risk