Quote:
Originally Posted by Mantelope
Incorrect; it'll actually drop your expected FPS as well as introduce greater variance. Not quite as serious as the long barrel/short cylinder situation, but regardless, you need to match your cylinder and your barrel.
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+1.
Think I posted this already, but I tried a full cylinder in my MP5 (229mm barrel, ported cylinder) few years, and where my gun was shooting 365fps at the time, I chronied it after and it sat at 330fps. Not matching the cylinder with the barrel length will cause problems, even when going to a shorter barrel than normal.