Yup I dont like Sterns diagrams eather but Marko is 5/5Exceeding Bob Sterns lofty goal is easy because his calculation assumes only 50% of the barrel volume is used before the valve no longer produces usable air to the further increase velocity of the projectile, but with SHORTER barrels this is far from the truth....its a awful calculation that I personally vastly improved upon that takes barrel length into consideration among other factors.
Marko is a smart guy.
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