had a quick question about barrel contour and accuracy. I bought a 300 win mag barrel off of the classifieds thinking it was the bear hunter barrel which has a heavier contour (my bad not the sellers) so before I spin it on my action am I wasting my time? I got this to stretch my legs a little (I shoot my .308 at 1000yds) I have some 208 a-max's and some re-22 and H1000. I'd be happy with a 1 MOA load but will a thin sporter hold up to strings of fire? say 10 rounds at a round a min between cooling?