I don' t think that that is an unreasonable prediction at all. You didn' t say what arm it is chambered in, and that makes an awful lot of difference, but to get a 7mm mag of almost any variety to shoot 1MOA out to a quarter mile isn' t asking a terrible amount.

I shoot a Ruger Mark II M-77 standard .30-06 with handloaded 150gr varminter boattails with a very cheap Tasco High country(their top of the line model when I bought it) 4-16X35mm glass over Ruger' s rings. I get groups on average in warm weather of .5MOA at 100-350yrds, so my flight is VERY regular, especially for a nearly stock arm. At 400yrds, my flight starts to open up a bit, shifting to an average of .8MOA, 1.2MOA at 600yrds and I' m up to 2MOA at 800yrds, but I don' t know that I' d ever shoot that far at anything anyway, I' m sure this rapid decay is due to extreme loss of velocity and bullet stability (any infinitescimle wobble has had a LONG time to work at that distance).