So I have report to make.
I swapped back in the OEM CYMA brass barrel and set the hop to 50% as a test. It now shoots 375 FPS. What I HAVEN'T tested is the OEM barrel with OEM bucking. I mean, it could simply be a poor bucking/barrel seal that's bringing it down in conjunction with the larger diameter. Hmmm... I should do one more test.
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