Regarding runout. I load my Highpower (AR-15) match ammo. on the Classic Cast Turret press. Last match I shot a 97 (out of 100) in rapid fire sitting and a 96 in the slow fire prone. These were at a 200 yd. range, so the slow fire prone is on a target that is reduced to simulate shooting at 600 yds. It is a very demanding target. The press loads very good ammo.
IMHO runout is one of those things that only very good benchrest shooters can detect any difference in accuracy on the target, unless it is extreme in the loaded rounds.