I just had the the chance to run my Cooper through the chrony. The rifle is a model 52, 24" barrel, chambered in 6.5x284 Norma. I have shot this rig out to 1,000yds. The one thing I now know, there is quite the difference from 500yds to 1,000. Anyway, the load I chronograph-ed was 140grn Berger vld's, 51grns 4831sc and a base to ogive of 2.380, which is approximately .01 off the lands. I was hoping the fps would be around 2,850. The five shots were, 2,996 / 2,926/ 2,969/ 2,965/ 2,943, for an average of 2,959. From what I've read, the sweet spot for this cartridge is 2,950, for what it's worth, that also seems to hold true for this rifle as well. Enjoy the outdoors!