I wouldn't run anything lighter than a 0.25 even out of a pistol, unless it was extreme CQB. I do have a friend who runs 0.20g BBs from his M60, which uas a high ROF (shoots 380 ish I think); that thing is a terror. Other than that, 0.20g BBs are only useful at the chrono station.
ďREALITY IS LIKE A STONE. TO MANY ITíS HARD AND COLD, THEY CANíT HUG IT OR EAT IT, IT ONLY FRUSTERATES THEM AND DOESNíT DO THEM MUCH GOOD. TO OTHERS ITíS STRONG AND DEPENDABLE, YOU CAN BUILD WITH IT, BUILD UPON IT, OR WORK WITH IT, ALSO USE IT TO SMASH PEOPLE IN THE FACE.Ē