Maybe my particular bullet selection has something to do with it ?? I tried it again with a Sierra 77gr Match King, granted that would be too heavy for a 1:12 barrel but, just as a comparison.

With the 77gr SMK, to the lands I read 3.136” using a Stoney Point OAL Gauge & Bullet Comparator in the 12 FVSS barrel, and 3.125” in my used 110 barrel.

If anyone else out there has a 22-250 and some 77gr SMKs, I'd really be interested to hear your readings.