After much screwing around / experimenting with 175g Nosler CC's and IMR-4064 I have found what I believe is the sweet spot on this pipe. Is a 26" CBI, 1-10 twist Savage small-shank Varmint drop-in from Jim @ Nothland.

41.9g IMR-4064 in Lapua brass with Nosler 175 CC's seated Long so at 0.005-0.007 Off Of Lands. Round is not mag. Compatible and regular .308 Ammo Box won't close one them...too long. Have't chrono'ed it yet so don't know speed.

3 rnds in a round-robin load & seating depth ladder came up with 0.183 Minute @ 100 yds. Tip of your pinkie won't fit in that hole.

Must measure chamber well and use a comparator to get this consistent. Too much variation in Meplat length.

God this chamber is LONG...

Just what I found. Maybe can be of help to someone else chasing the bug-holes😜