Of the two barrels I have I am 50/50. The first barrel (6.5 CM) was great right out of the box. Which prompted me to order another barrel. I ordered a .308 barrel and currently have issue with it. The throat is short. I measured max COAL with Hornady 168 ELD-M. Max measure is 2.770" not jammed but firmly seated in the throat. So approx .030 short of the recommended 2.800" Same issue when I tried 168 SST still can't reach spec COAL. Still waiting to hear back from them.
I don't see that as a problem.... Plus, having a slightly shorter COAL isn't a bad thing. What the reloading book mentions is that to have a cartridge load properly in a mag it should be no longer than 2.800 but that also depends on the mag you use, the bullet you use and everything else. But it doesn't necessarily mean it "needs" to be that length.
I reload for my .308 with a COAL longer than 2.800 even though the reloading book says the max is 2.800. Loading for the same "off the lands" will give a different COAL depending on the bullet I use also.