BTW you don't ever know if you have pressure basically, unless you have a pressure gauge
Brass can tell some stories, but it can often lie big time too.
I"d go with case head expansion over what brass looks like every time.
And as noted, unless both yorus and his chrono's are calibrated, 100 fps ain't hard to come up with for a difference imho.
Yup, totally in agreement.
Along those lines, I should clarify that some of the brass I used (S&B and some Hornady) was from factory new 6.8 ammo, and worked fine in 6.8, but not in the ARP 30 Herrett. The issues were loose primer pockets and case flow into the ejector and extractor holes.
It doesn't matter to me whether the issue was the barrel or the loads in general, but the comparison tells me pretty clearly that pressure was too high in that barrel at least. My new barrel, that I made and chambered, shoots fine with the same loads.
