Posted by: Jim "The_Slayer" Warren on December 25, 2002 at 23:52:24

: First off, Compressed air or nitrogen. That is my vote. This is why. : : Co2 is cheaper by far for tanks and such, however it has many down falls. It is stored as a liquid and uses large amounts of heat to turn that liquid to gas, so it isn't as consistant. It is by far dirtier then HPA, and isn't as easy to regulate, again due to the liquid storage. : Compressed air is just that, air, not liquid. Isn't affected by temperature like co2. Much more consistant and easier to regulate down. Is very clean. In some cases I could tell a minor difference in how loud the gun was. However, bigger tanks, higher pressure (co2 runs around 1000 psi, while your minimum 3000 for HPA), and much more expensive tank that you have to take care of. They are normally (unless you get a steal, which is really heavy) made of carbon fiber or some other material that is much easier to gouge, so you must take care to not do this. They also range in the 100-500 dollar range, while co2 tanks are in the 30 dollare area. I recommend HPA just because the ease of use far pays for the cost. All of this being said... don't such things as expansion chambers help reduce the inconsistencies associated with CO2? I have a similar question to this one, but I'm more concerned with the bang for the buck aspect. It will cost me the same to charge a 3000psi HPA tank no matter what size, but CO2 costs vary with tanks size. BUT... considering a 68cu.in. HPA tank runs about $150 vs. $29.99 for another 20oz CO2 bottle, I'm not so sure that the price per fill is a concern, particuarly since the field I play at charges the same for a 20oz CO2 as any HPA bottle. Now, the other concern I have is shots per charge. I can play for a fairly long time on a single 20oz CO2 charge (in the 'hood of 800 to 900 shots, estimated... haven't really counted). I have heard that HPA is not as efficient. Is this the case?

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