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ThunderCactus · March 14th, 2017, 01:44

You've got too much volume to push out a light BB. I assume you're using .20s to chrono with the 260mm?
The BB is leaving the barrel before the air even gets a chance to really compress itself. So try chronoing with a .28 or .30 first.

March 14th, 2017, 01:44	#3
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	You've got too much volume to push out a light BB. I assume you're using .20s to chrono with the 260mm? The BB is leaving the barrel before the air even gets a chance to really compress itself. So try chronoing with a .28 or .30 first.