Originally Posted by Styrak
Gas guns are WAY different when it comes to FPS differences between weights. They aren't affected as much. For example, my P229 fires 270 on .2's, and 260-ish on .28's. In an AEG, the system is steady, there is always the same amount of air pushing the BB. In a gas pistol, with heavier weights the BB in in the barrel for a longer time, allowing for more gas expansion and more energy transferred to the BB. Hence why I only shoot 10 FPS difference between .2's and .28's on my 229. Make sense?
That makes sense. I'll try running my 416 thru my chrony with .2s, .25, and .28s tonight to try to gauge the difference.