TargetTalk

I bought a Walther CP2 CO2 pistol several years ago. I'm trying to get the cylinders filled & need some guidance. The fill adapter that came with the gun will thread directly onto a CO2 tank. The guy at the welding supply company said their CO2 tanks are charged at 800psi. We looked through their fitting catalog & couldn't find a way to adapt a regulator to this fill adapter. The cylinders seem plenty heavy to handle the pressure but I didn't want to damage the gun. Any info would be appreciated.

The guys at my club with co2 guns connect to the tank valve, it comes out as a liquid I believe, hence the lower pressure?
Sorry I havn't paid too much attention as the clubs guns all run on air, which I understand is about 3000 psi.
Both the co2 and air cylinders are next to each other, but the co2 is much taller and isn't fitted with the yoke gadet to take the adaptor.
No doubt someone more knowledgeable than I will be along shortly.

http://www.pilkguns.com/co2.shtml

No regulator is needed for co2.
You want the LIQUID co2 from the tank, not the gas. So unless the tank has a syphon, you will have to invert the tank to get the liquid co2 out of the tank. This is fine up to a 10 pound tank, but beyond that, the tank is too heavy to easily and safely invert. In fact I prefer an even lighter 5 pound tank, if I have to invert the tank.

First, look at the guns tank. There are 2 numbers. One is the empty weight, and the 2nd is either the full weight or the co2 weight (empty + co2 = full). You need to know the full weight so you don't overfill the tank. The CO2 fill level can only be determined by weight.
Example:
300g tare = empty weight of the cylinder
40g = the co2 weight
340 = the full/max weight

Second, get a scale that can measure the empty and full weight. I use a small digital kitchen scale from the department store. Then learn how to use it to measure your tank in grams.

- Weigh the tank, to determine how much co2 is in the tank.
- CHILL the guns tank in the fridge. I think I do 30 min in the fridge (NOT the freezer). If you make the tank too cold it could overfill.
- Screw the adapter directly onto the co2 tank.
- Screw the guns tank onto the adapter.
- Then CAREFULLY invert the tank, so the valve is now at the bottom.
- Open the valve for maybe 5 seconds, and the guns tank will be filled.
- Close the valve and invert the tank to the normal upright position.
- Remove the guns tank.
- Weigh the tank to determine fill level.
>> Do NOT overfill the tank.

Done.

Thank you very much for the information!

GaryN had it all correct.

However: quick and dirty....put cylinder in freezer for 3 or 4 minutes (or not) and fill as above. Don't worry about the weight of the cylinder; you'll get plenty of shots (over 200). If you do overfill (the gun won't work), just bleed the cylinder a little.

Rover and GaryN are correct. I have a CP3: If I may add...wear light gloves to keep from getting cold hands. Do a lot of weighing (I have a postal scale that reads in ounces and grams) to get comfy with the process. Write stuff down. I made up a cylinder-charge sheet so I can keep track of when I charged the cylinder(s), how heavy it was, and when I installed it on the gun. And I made a small card (business-card-size template) that sort of allows me to keep track of how many shots I fired with that cylinder/charge. Courtesy of my gun's previous owner I have a tank with a siphon. It is heavy. I am very pleased with the CP3, by the way. It shoots a lot better than I can! Yet there is always that Great Promise: I shot a 49 the other night in a club match. Perhaps needless to say, my performance otherwise was not stellar. More of a lunar thing.

Lunar thing? Does that mean you "mooned" the other competitors?

I thought I was the only one who did that. (Just ask Clarence Perkins)

Ah. Now I can more accurately visualize the Elite 10m AP Post-Match Locker Room: a veritable Orrery of Triumph and Disdain. : )

I guess you could say I feel the world revolves around my ass...

The Walthers are great guns; I've owned five of them.

With all the time spent cogitating on your fill levels, you could have been dry firing to enhance your skill.

Too much useless effort ...just do the quick and dirty as above.

Rover wrote:Lunar thing? Does that mean you "mooned" the other competitors?

I thought I was the only one who did that. (Just ask Clarence Perkins)

This is the reason that when I shoot next to Rover at our club that I make sure I am to his left(I am a right handed shooter).
This allows total concentration on my target and not on his lunar phase...

Clarence :)