I too get a sense that there is a lot of "mysticism" associated with the M200, i.e. that people think it somehow has "superpowers". Even so, CheyTac's facts and figues are rather impressive when taken on their own, despite the smoke and mirrors. How 'bout debunking them and make ATRS occupy their niche!? 
I always thought that a single shot allows more leeway in terms of setting your COAL to an optimum value, which a magazine may be too short to allow, which would give your rifle a bit of an edge, no?
Are the bigger calibers less affected by COAL? I can definetely see a difference with my humble .308 when I play around with seating depth...

The fact that they have a mag fed rifle I think is irrelevant as far as accuracy goes.
I always thought that a single shot allows more leeway in terms of setting your COAL to an optimum value, which a magazine may be too short to allow, which would give your rifle a bit of an edge, no?
Are the bigger calibers less affected by COAL? I can definetely see a difference with my humble .308 when I play around with seating depth...