[ThunderCactus]

Well the big problem with the 6.08 barrels is that none of them were of any sort of quality lol

The prommy 6.03 and PDI 6.05 are high standard, super polished, stupid accurate, honed out stainless barrels, and they've been the basis of comparison for every other barrel.
The PTW barrel even at 6.04 is more concentric than any other brass barrel on the market

The 6.08's are primarily AEG OEM barrels made on the cheap, so it's quite rare to run into a fairly concentric and accurate barrel outside of marui

But with higher quality wide bores, like the orga 6.10 and 6.13, we've found them to have the same accuracy as the tighter bore barrels, and maintain their accuracy longer.
Problem is we still don't have anything in the 6.06-6.12 range for AEG's that comes close to the PDI 6.05/prometheus 6.03 quality

As well in the PTW world, right now the two best reviewed barrels are the OEM evo 6.04 and ORGA 6.10, reviews saying they're on par with each other


Switching to the 6.20 barrel, I'd recommend actually changing the cylinder as it's a pretty significant change in volume. As well expect to lose 45+fps
Going from a 6.04 to 6.10 PTW users generally lose 25-30fps