When shooting at longer ranges it is best to go with a bullet that will buck the wind better. A 165 or 168 is the lightest I'd go with in any .30 at 300yds and beyond. As far as accuracy goes at 100yds a 3/16" center to center group (measured with a caliper) ain't bad. Same loads at 312yds are 1" and at 600yds 31/4" if I hold steady enough and read the wind right.