Hey fellas please help me understand how I could possibly be getting such wide variations in bullet speed in these 17 shots: 3,152 fps 3,159 3,122 3,167 3,174 3,108 3,093 3,129 3,152 3,115 3,072 3,079 3,144 3,122 3,144 3,152 3,108 These are chronometer readings starting from last shot to first. High: 3,174 fps, Low 3,072 fps The results were 5.5 inch groups at 200 yds. I've had .75 MOA at 100 yds with this load, so I had felt pretty confident in it. Caliber: .300 RUM Bullet: Berger 185 gr VLD Powder: 93.5 gr H-1000 Seating Depth:-.175 off lands (Magazine Fit) Primer: Federal 215 Chrono: Competition Electronics Pro Chrono Every load was precisely measured, then measured again, cases universally trimmed, etc. I do not go as far as to separate bullets by weight. Could the jump to the lands cause bullet distortion, thus changes in pressure, resulting in bullet speed variations? I know Berger recommends backing off the lands incrementally until the best depth is found, but this is a hunting rifle and I feel a whole lot better with 2nd and 3rd shot cartridges that fit my magazine. More importantly, could this possibly be a sign of barrel / chamber issues? Also, on another note, I have been told that a 185 grain bullet may be a bit light for a .300 RUM... that a 200-220 grain bullet will be more stable and have better ballistics at long distances. Any thoughts there? Thanks for your help!