I've had some rounds I was filling with helium along side my 260s at a theatre event this past Christmas and would occassionally use the helium to fill a 260 if I needed on done quickly - they do not float. Dropping a balloon may make it fall slower, but even that isn't really noticeable.
There isn't much air space inside the balloon for the helium to lighten the load enough for it to react the way rounds and mylars do.
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Last edited by Jolly Well; 06-03-2008 at 03:34 PM.
Reason: fat fingers
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