Wouldn't expect our rifle chambers to vary that much. I used new brass and loaded it at the 2.940" COAL from the 2024 Hodgdon manual.
Going to shoot 15 more pieces of new 7mm SAUM brass with three different bullets tomorrow: Speer GS 130gr, Hornady ELDx 145gr, and the Nosler Accubond LR 165gr. All loaded with medium charges of Win 6.5 StaBall and COALs from the 2024 Hodgdon manual and the Lyman 51 manual. If I have time, I'm going to clean/anneal/load the once fired cases with the 170 Berger and a slower burning powder and measure velocity. I'd like to find out if lighter bullets form the brass as well as heavier ones. I'll let you know how it goes.