Zak, can you give more detail into how you go about getting your LR rifles to be more thermally stable? What else besides a quality bedding job and barrel goes into a rifle that shoots POA/POI thought a course of fire? Does cryo'ing the barrel help any? How much do the “temperature insensitive” powders help as the seasons change?
Personally I buy complete AI rifles - problem solved. In a conventional rifle, a good non-wood stock and bedding job should do it. A custom or blueprinted action should help, and a barrel that was made right will help. I don't think cryoing the barrel is necessary. Only one of my rifles has had one (older JP CTR02), but the majority of my rifles just have top-shelf "cut" match barrels. I've seen as small as 10 fps change in temp stable powders. Anything less than a 40 fps spread is doing really good (freezing to 100).