AA 123 scenar COAL change?

[cst]

I bought some AA 6.5 Grendel ammo with Hornady 129gr SSTs back in January 2020. Just checked a 20 round sample of them from 4 different boxes & the COAL ranged from 2.261" to 2.266". It does, indeed, appear AA is seating that bullet a bit deeper now days. Had no problem loading them in an ASC mag.

Have you ever chronoed the SSTs? (If..so what's your barrel length?)