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Old 9th October 2013, 06:53 PM
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rich rich is offline
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Join Date: Nov 2008
Location: Shebbear, N Devon
Posts: 1,643

Sven, I see it like this. For a given power output with a given pellet, a spring gun can achieve that power in a shorter barrel than the PCP needs, and it uses less air as well, by a factor of maybe 3x.

So if the mass of the pellet can be accelerated to the necessary speed in less time (as it's a shorter barrel) then the acceleration force on the springer pellet must be greater. That can only come from a higher pressure at some time in the firing cycle, especially as so much less air is being used.
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