I use my .3g bioshots in my GBB that gets a little under 300fps with .2g. I still have to figure out how to take it apart to modify the hopup though because it is one of those cheaper ones that was never meant to be upgraded or used past 80 or 90 feet. As long as you get the hopup right you can get that bb to float out there, although at that point they might not even feel it.