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Old 10-26-2009, 09:39 PM
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Propane or CO2

I am looking at getting this GBB http://www.airsoftpost.com/xcelerato...k-p-31520.html

But I dont know whether to get the propane version or the CO2 version. I'd like the Co2 version but i've heard that the gass can break the gun quicker because its a more pressurized gas. Also i've heard that the mags will stick out the bottom which I think that extended mags are the ugliest thing ever but because of the extended mag well on this gun, would it even be visable. Also if anyone has this gun could they either post it here or PM me on how the gun works.

Thanks in Advance
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Old 10-26-2009, 10:03 PM
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I heard that the plastic internals of GBB's can break because of the power of CO2, so I would go with propane.
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Old 10-26-2009, 10:06 PM
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Quote:
Originally Posted by Izokay View Post
I heard that the plastic internals of GBB's can break because of the power of CO2, so I would go with propane.
You heard, or you have direct experience? Only state information that you know from first hand accounts. Not "I heard she said he said".
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Old 10-26-2009, 11:50 PM
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Something to be aware of with CO2 pistols is that they can shoot hot (some over 400fps). Usually, one will carry a sidearm to use indoors/when breaching a building, where fps is generally restricted to 350fps. Most green gas/propane guns shoot about 300fps stock, and easily meet this requirement.

Before buying I would contact Evike and make sure the CO2 version shoots the claimed 300-320, their spec on fps may be going off of the green gas version.

Last edited by maglips; 10-26-2009 at 11:52 PM.
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Old 10-27-2009, 12:17 AM
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I agree with maglips. C02 mags shoot much harder than propane! While pistols dont get chrono'd it leaves it up to the players to be responsible with their pistols. Personally I chose a pistol that chronos around 300 (using propane) as something that would be safe for CQB use.

Having used two identical guns, one with propane and the other with C02, I can definitely tell you that C02 will add more stress on your gun. Am I saying that C02 will break your gun? No. But the increased blowback and fps will increase the stress on it without a doubt.

That being said C02 does have some advantages. You can get many more shots out of a C02 cartridge over filling the mag with propane. The increased pressure will also grant you higher fps, increasing your effective range. This doesnt turn your pistol into a long range weapon though!

Personally I use propane for my GBB's because once you have bought a propane adaptor, the tanks are dirt cheap and last a loooooooonnnnnnngggggggg time. I have team mates that swear by C02 however I find that propane works just fine for me. Ultimately it comes down to your personal preference.
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Old 10-27-2009, 01:37 AM
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Ninja fish hits one of the best points of propane, cost. Buy an adapter and then you have gas available to you at a low cost. Propane tanks run about $2.50 each and can be purchased at camp stores or Walmart. We bought a few tanks over the summer for the team and just filling pistols we barely went through one. During the winter months we lose the number of shots per mag due to the cold using propane, but you'll have simular problems with CO2.

Remember with Propane you will have to add silocone oil to the adapter to keep the mags and gun lubed.
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Old 10-27-2009, 02:33 PM
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Has anyone here chrono'd a pistol shooting with CO2 first hand? I'd be interested to know how hot they actually do shoot.

That would definitely be my biggest concern getting a CO2 pistol, it shooting too hot to safely use.
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Old 10-27-2009, 02:50 PM
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We have actually prohibited the use of CO2 pistols at our events because the ones we have chrono'd at Red Dragon have shot 400+ FPS. That was using .20g bb's with a Madbull chrono. The fact the some CO2 pistols have peaked 500 fps had prompted us to chrono all pistols.
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Old 10-27-2009, 03:05 PM
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if i were you i would go with propane, just because it's easier to maintain the gun with the oil you have to mix with the propain. My airsoft guns get a lot of TLC (tender loving care) and with my shotgun needs A LOT of oil. so...... go with propain, plus its $5 for two cans of propain at walmart.
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Old 10-27-2009, 05:05 PM
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Quote:
Originally Posted by Fish20 View Post
Has anyone here chrono'd a pistol shooting with CO2 first hand? I'd be interested to know how hot they actually do shoot.

That would definitely be my biggest concern getting a CO2 pistol, it shooting too hot to safely use.
That's definitely a major concern when choosing an airsoft gas gun. In my experience with CO2 powered pistols, the main focus with CO2 powered guns, at least with blow-backs, is cold-weather performance. Green Gas (HFC-22), propane, and CO2 are all compressed gasses. The rate at which each gas is compressed, and the amount of pressure, upon expansion, each type of gas can produce can differ significantly from one gas to another (Liquid Oxygen GBB's anyone??).

Then a gas is compressed, it becomes a liquid. Bottled green gas, propane and CO2 are all compressed to liquid form. At room temperature (average 72 degrees F), HFC-22 is 120psi, Propane is at 140psi, and CO2 is at a whopping 860psi. If you increase the temperature, you also increase the pressure. And decreasing temperature also decreased the pressure too. This means the hotter the outside temperature is, the more pressure any gas is going exert upon expansion.

One really neat experiment to do is to gas up your magazine with propane or green gas, and do some chrono testing. See what velocities you're getting. Then gas up another magazine, and let it set out in the sun for a few hours on a warm day, then see what velocity you're getting with that magazine. It will be a LOT higher.

Once you bring CO2 into the mix, pressures increase even more. Many people have heard the stories about paintball tanks, or even compressed air tanks used for paintball, exploding while in someone's trunk or garage on a hot day. There was even a girl who got her arm blown off when her damaged air tank exploded on a hot day while playing paintball (ouch!).

The benefit of using CO2, at least when it concerns airsoft gas blowback guns (non-blowbacks excluded), is that in colder weather, when temperatures start dropping into the 40's, 30's and colder, green gas and propane really start to lose their power. CO2, since it has a higher psi in liquid form, can be effectively used in most GBB's without increasing muzzle velocity in cold weather. I don't really recommend it for use in hot weather, but it can be used if you want to, but I'd personally recommend having the gun chrono'd or using the gun only for target practice.

The problem with CO2 non-blowbacks, like the ones Crosman have on the market, is that 100% of the CO2's power is used to propel the BB. In a GBB, a significant portion is also used to power the blowback action, and you lose some of that velocity because of it. Since CO2 gets more powerful as the outside air temp rises, it becomes even more of a problem. As others have mentioned, I've chrono'd Crosman CO2 pistols as high as 550fps in the past. That was on a 90+ degree day though. That being said, those guns often shoot in the 380-450 range very frequently, which is why they are kind of frowned upon on the airsoft field.

Compound the high velocity factor into a small package that can be used for indoors, and the danger grows even more. Imaging entering a building only to have someone shoot you from 15 feet away with a gun that's shooting in the mid-400's?? Ouch!

Going into the winter months, many people in Ohio typically mothball their gas guns for a few months until temps begin to increase once again. But they can sometimes use their CO2 guns as long as it doen't get too cold, and if velocity isn't a problem.

Regardless of how much you like or dislike CO2 guns, just make sure to do a lot of research on a gun before or after you buy so that you don't get disappointed if you're not allowed to play with it at an airsoft event.

Darkstar out.
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Old 10-27-2009, 09:17 PM
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Ok thanks everyone for all the reply's. I think i've decided to go with the propane/ Green gas version instead. I really don't play much airsoft past september and I don't start playing till about april so I should be good on the temperature and if not I do have my handy dandy crosman gun =). Also how many seconds usually should I be letting gas into the mag so that I get top performance from the gun. Thank you all again.
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Old 10-27-2009, 09:56 PM
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my co2 pistol cronos at 320 with .2s and it will shoot about 3 mags worth of bb,s before it needs changed and i use it in freezing weather while green gas guns set in your car useless. who wants a gun you cant use all year round.
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Old 10-27-2009, 10:10 PM
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It would probably be more helpful to borderpolice if you said what brand/model of gun it is.

Last edited by maglips; 10-27-2009 at 10:12 PM.
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Old 10-28-2009, 11:25 AM
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Quote:
Originally Posted by 6mmpro View Post
my co2 pistol cronos at 320 with .2s and it will shoot about 3 mags worth of bb,s before it needs changed and i use it in freezing weather while green gas guns set in your car useless. who wants a gun you cant use all year round.
Well based on evidence in this thread, it seems that CO2 guns can't be used year round either? I hope you chrono that pistol during the summer months. Just to be safe.
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