The Unique loads, though, have been tried and published in other places than the usual load manuals. Rocky Raab's written about it. The NECO firelapping manual includes quite a number of Unque recipes for bottleneck cases, .308 included. So this isn't new turf, really.
If you want to locate more such data, try searching for sub-sonic loads and catsneeze loads here and at castboolits.com.
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member