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Originally Posted by blueballz
im not sure if i understand the ballistics totallly. but seems like your saying heavier bbs travel further. so thats the reason your using .42 bbs on ur gbb. so then why not use heavier bbs than .25s on our aegs? sorry guys for the 'stupid' questions. thanks for everyones time and help!
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I was confused about why I'd get almost stock AEG velocity with 0.43g BBs yet foudn that 0.30g didn't work so great in my MP5 (0.25g are ideal) and out of the blue yesterday Illusion messages with me and explained why there isn't a big drop in fps with a heavyer BB in a GBB as opposed to a spring gun with a piston. Spring gun with a piston always shoves the same amount of air down the barrel no matter the wieght of BBs, with the same pressure each time. Because gas guns rely on gas expansion, the heavier BB causes the acceleration to slow done, causing the gas to expand with higher pressure, therefore giving higher fps. So, my G19 shoots 341fps with 0.20g BBs, and shoots 265fps or there abouts with 0.43g. But my MP5, shooting 385fps with 0.20g BBs would probably see about 250fps or less with 0.43g.
Nutshell for your question, longer inner barrel will only really give you a bit higher fps. Unless you choose good wieght of ammo (0.25g) you won't get much in the way of increased range with 0.20g. Range is the fps + the stability of the BB (higher weight = more stable) + properly set hop up + the way you aim. Nothing wrong or cheating by aiming higher if you need to get get longer range. Some will whine about that, call it "lobbing", but it's a basic need for any shooter with any projectile launcher.