Why are you concerned about Gravity? You only measure mass and velocity. No force needed and no measure of acceleration or deceleration.
Pellet drops in flight of course.
Actually nobody weighs pellets accurately anyway. If it becomes an issue you need a set of BFTA weights equivalent to, say, 10 7.9s or 8.4s. Then you make a reasonable average for 10 over any slight variation between pellets.
Balance scales are always better than anything based on a load cell ( strain gauge ) but it is highly unlikely that a course would ever be up to a laboratory standard.
BFTA Secretary 2012-2014
CSFTA Secretary 2014-2016
Last edited by neilL; 11th November 2014 at 12:25 PM.
Reason: Mass vs Weight