If two bb's of the same weight leave a barrel at the same velocity they should have the same travel distance, theoretically. If they don't then something is putting another force on the bb that causes drop in velocity more quickly. The way I read this potential sticky is that proper matching can result in more velocity, which should be the only thing effecting range.
"As a result, the remaining air is wasted energy and the BB does not reach its full speed potential because the transfer of energy was not complete. The reason full cylinders are used on long barrel guns such as an M-16 is because the long barrel gives the BB more time to reach its maximum speed."
This implies that you will achieve higher velocity, and thereby longer range, which makes sense.