Hmm, maybe time to clean the thead?...
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Repair FAQ: Goofy Velocity Issue
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Just incase anyone else ever has this happen. I tried a sanding job on my stock bolt because I swelled it (I know, stupid me.. and check the Lubrication thread, I'm adding a new post there about proper lubing soon)...
...anyway, I was getting HORRIBLE blowback, and I think it was from air getting through deep sanding grooves in my bolt that I didn't get out. Anyway, I replaced the bolt, the blowback stopped (Used a Vapor Bolt, thanks again Yoda), and the velocity fixed itself very nicely.
Hope no-one else runs into this type of problem
