I've seen the 338 LM chambered in the 993, 995 and TRG.
Then there's the TRG-22(?) in 308 W.
Does anyone know if these all have the same size bolt, number of lugs, degree lift, etc.?

No Sako experts around?

The .338 Lapua is chambered only in the Model 995, a synthetic-stocked sporter, which is also known as the TRG-s. It is also chambered in the TRG or Model 42 tactical rifle (the .308 is the similar Model 22, I believe). Any reference to a "Model 993" is erroneous. Both of these use a similar three-lug bolt.

Great. Thanks for the info.
Now, what about this TRG-22. Is it the same size action, just shorter in length, or is it entirely scaled down for the 308 W?