Niksan Cold to hot sweating

Ahhhhhh, would that explain why I notice muzzle vapor on 300bar guns next to me at the range, and not the 200bar?
It's possible that the vapor you are seeing coming out of the air rifles isn't really coming out of the rifles. The muzzle blast is fast-moving high-pressure air that can create a low-pressure area around and following it. The humidity in the air (the weather outside of the gun) will condense briefly in a low-pressure condition and can sometimes be visible. So what you are seeing is more likely a vapor trail like what you see from the wing tips of air craft. The air craft isn't spitting water vapor out, it's just producing a low-pressure area.

stovepipe
 
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