I must apologize for some pictorial confusion. I started the thread talking about the barrel and a few posts later included a picture to talk about the stock (and for that pic used an older photo with a BAT action). I have 6 barrels that fit the BAT ranging from #3 - 5 Kreigers. You can google Kreiger barrel contours for the specs.
Last summer I bought one of Karl’s 2 lug actions and since then have had him chamber a couple of his barrels....the later of which is the four groove 308.
This pic is with the KSA action and two of the KSA barrels I had chambered. The one on the rifle is 308, the loose barrel is 6.5 SLR.