yes it does make a HUGE difference. more wheigh = slower travel but greater flight stability and range, so depending on your gun's velocity you would like to use the heavier bb's. personally i use .28 outside and .25 cqb, in my sniper rifle its .30-.36 and i keep 2 bags of .20 for chronying
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Last edited by lemegacool; July 4th, 2009 at 14:31..