We usually make the MSED a bit farther than what the guide says, just to be safe. Been working on flat hopping a Tippmann M4. When I put a tightbore 6.03 in, the FPS went up a good 100... It's at about 450 with .2s now, but I do understand joule creep with gbb and heavier bbs, that's why I really like this chart.
You know, just a minute ago I was reading an old post of yours and chuckled at the "Hates DMRs" bit... Thanks for replying so fast!