Im actually not surprised. Back when I was shooting inlines I tested a 30" barrel VS a 27" barrel and got a whopping 45 fps increase with the 30" barrel.
Its a huge difference with smokeless powders like my m44 20" barrel VS my brothers m91/30 with a 28" barrel. 300 FPS difference in fact.
Last edited by MountainDevil54; 09-23-2018 at 12:36 PM.