Piston diameter and stroke both trend smaller for sliding-breech fixed barrel guns than for breakbarrels , so breakbarrels start out with an advantage. There are exceptions; the RWS 460, for example, is dead even with its breakbarrel cousin the 350 in terms of power. The CFX series should be close to, but just under the performance of the Shadow/440/220 etc. - due to the small additional dead air space and possible sealing imperfections associated with the rotating loading port. Maybe someone can chime in on this aspect with real experience.
This message has been edited by stepar on Jan 20, 2008 6:58 PM
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