Yeah, anyone who's had a brass casing land down the back of their neck can attest to how much water heat they draw away from the weapon. I also wonder how impo

Yeah, anyone who's had a brass casing land down the back of their neck can attest to how much water heat they draw away from the weapon. I also wonder how important the gas exchange caused by the mechanical cycling of the action is to cooling, as most modern rifles are pretty well sealed when in battery.