MrBorland;
We only did an 800 point aggregate on NRA Smallbore this time. The smallbore aggregate we shoot, does 3-Pos conventional; 10 shots each standing, sitting/kneeling, and prone at 100 yards. Then we do the DEWAR course, which is 40 shots prone. I work people up through the NRA Marksmanship program to get them "broke in" on it, which culminates in the DEWAR course specifications at the Distinguished Expert level. (By then they should be putting down master scores in the national rankings).
Even so, it's kind of a drawn out, brutal, short range match to shoot in these temps. You don't get the benefits of any artificial support except a loop sling (except light rifle; slings are banned on light rifle).
F-Class is much easier on the body, as you get both bipod and rear rest. Shaking arms from cold don't affect you as much, although chattering teeth do.
Chris shooting NRA High Power Midrange Prone (F-Class, or, more specifically, F-T/R)
Kevin shooting NRA Smallbore (Kevin is shooting Any Sight with his Anschutz)