D'oh. VZ58 woes continue. It chronos at or around the stated 320fps...without hop. But in order to get enough hop to lift .28s, it increases to the equivalent of 365-370. D'oh.
Hop-up's supposed to decrease FPS, if it's allowing additional air-pressure to build up as the BB's fired to this degree then perhaps the cylinder is over-volume? I'm not sure but that don't sound right!
