I set up a 300 RUM sendero for a friend before elk season. He put a Leupold VX2, 6-18 Target on it and I told him to buy some 200g AB"s, Retumbo, and Federal Mag Match primers. I loaded up 3 each at 93g, 94g and 95g. 95g turned out to be a real winner. 3225fps, less than 10fps deviation, 3/4" @200 yards. I then came home, loaded up 3 more, got the clicks figured out and shot a 3.5" group at 525. Not to shabby if you ask me for throwing a load together with a Sendero out of the box. He packed the sendero into the canyons for 5 days then said the hell with it. He could not pack it up and down the canyons with a bad knee and back this year. He ended up taking his Rem 300 Win Mag with 180g BT's I loaded up for him as well, and ended up taking his 5x5 bull the next day at lasered 750 yards. I really really wished he would have had his 300 RUM that I set up for him to see what the performance would have been like. I would see no trouble getting 1/2" at 100 yards with fine tuned load.