Quote:
Originally Posted by sortie39
Yep that makes sense Q=1/2*mass*velocity^2.
But experience showed me that the 4.5 one always gives a lot more FPS, I was thinking it might be due to the different degrees of penetration, or temporary impulse that the bullets offer when actually colliding with the chronograph's surface.
Anyways, kinder off-topic..
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No. If the only thing that changed is going to a lighter projectile, you're going to be shooting hotter.
I'm not sure why you don't understand the physics. It's the same as changing to a heavier or lighter airsoft BB in; your FPS is going to drop or go up.
Apparently a .177 caliber BB weighs 5.1 grains, or 0.33g
Taking that into account, that BB gun that shoots 410 FPS would shoot 514fps on a 0.20g airsoft BB.