Originally posted by Skeetmaster
How do you ever get more shots from Co2?
1l of Co2 at 900 psi is a sh1tload less than 1l of air at 4500 psi!!
Um, no. Looking at very rough numbers, 20oz of CO2 (somewhere around half a litre) will give you around 1000-1200 shots on most markers. 1.1 litres of air at 4500psi will give you... around 1000-1200 shots on most markers. So CO2 does give you a lot more shots per unit volume - about twice as many.
Many basic markers will work equally well on CO2 as on air, as long as they're set up correctly (there's the catch!) I noticed no marked improvement switching from CO2 to air on my Piranha, for example, even in the winter. There's just no point spending lots of extra cash to upgrade a cheap marker with air. Most higher-end markers will be much happier on air, though. And as you say, the cost differential is getting smaller all the time.