Gun freezing

Hm.

Well what type of expansion chamber is it? If its just a regular ole' 2 Stage, it wont do much.

Also look into getting a Anti-Siphon kit. That will keep out all liquid Co2(unless installed wrong) and their like $4.

Well, the ROF of an RT kit will give the bottle and X-chamber both less time for the CO2 in them to expand to a gas before reaching the valve. Even then, if you're wailing with the RT, you're going to experience chill-down. My barrel on my DMLCD gets frosty when I play a hard game and sling a lot of paint, and I'm using HPA. Any gas, as it expands and equalizes to atmospheric pressure, has a cooling effect. This is how refrigeration works. Tippmann's x-chambers are 2-stage as well, they don't perform as well as say, an ACI 6-stage, but so long as you aren't experiencing velocity spikes that put you over 300fps, I wouldn't worry about it too much.