I don't want to hurt my friends with some little bitty bb that flew too fast.
sent from bad A android.
Heavier BBs will be more accurate, but they will also hurt more. This is because heavier BB's carry more
energy (because of their weight) while they are flying towards their target.
Heavier BBs may be slower than light BB's at first, but they are actually faster once they reach a certain distance because they take longer to lose their moving energy.
IMHO, nothing lower than 0.30g...
0.30g-- the bare minimum BB weight @480FPS, not that accurate
0.36g-- more accurate, but still possible to be more accurate
0.40~0.43-- most accurate, but it
WILL hurt the most
Therefore, a .2 g bb shot out of a gun will have around the same energy as a .4 shot from the same gun(even though it will fly at lower speeds than a .2).
Heavier BBs have a higher energy output at the muzzle of a rifle. This is due to the heavier BB's greater amount of momentum. Lighter BBs get affected by air resistance a lot more because not only are they lighter, but they are going faster. So by the time a light or heavy BB has reach the muzzle, they are actually exhibiting speeds than what is expected mathematically.
The force (air) coming out of the cylinder is the same regardless of BB weight, but once the BB gets pushed by this force, the BBs themselves begin to associate different energy levels.