Not quite. Turn you hop off, fire some 0.25g bb at a target at distance and see where they go. Dial in a little hop, fire some more bbs, and repeat process until they fly in a trajectory that you like. The 0.25g will have more momentum than the lighter 0.20g bb so should travel a little further. This is simplistic answer, and is the process I use, but our forum gurus can explain in much better detail.