PDI barrel arrived this morning. What a beauty she is as well! Even has the oring at the end to ensire it's centered correctly and ideal length of 129mm. Strange how the ZCI was only 1mm longer but seemed to sit so much further forward. Anyway, installed it this evening and couldn't help but do a quick test fire. Again at 80psi I was getting roughly 300fps with a 0.25 which is about perfect for what I want.
I have noticed though a fairly bad feeding problem only getting about 1 in every 3 or 5 shots a BB comes through.
When I strip down for the nozzle valve spring I'll look into this more closely but did also notice the flow valve in the mag is leaking as well so that's going to get pulled out, lubed and then likely upgraded.