For my 300 RUM I got different components loaded 27 rounds using 9 different loads from 89 gr. of Retumbo to 95 gr. of Retumbo. 210 gr. Berger. Powder and bullets I did not change. I did change brass to Nosler brass, Primes to CCI-250 instead of fereral. I seated the bullet 0.015 into the lands. First time ever the action screws had been torqued using a torque wrench, also I used a cheek piece on the stock which does help a whole lot. All 27 bulles in 9 "3 shots" groups shot at 302 yards averaged 0.667 MOA's which is 2.11" at 302 yards. Not so good... Well is a factory 300 RUM... is the same as saying 0.7" @ 100 yards... remember, that's an average of 9 different charges. The smallest group was 89 gr. @2924 ft/sec which grouped 1.2" at 302 yds. = 0.397" @ 100 yards. Because I'm quite low on muzzle velocity this is what I decided: Please notice that the 1.5" group line touches the graph in two different places, at 90.9 gr. and at 91.7 gr. Half way in between would be about 91.3 gr. having a plus or minus 0.4 grains to keep my groups at 1.5" or less at 302 yards. My aim is to get closer to 1.0" at 300 yards. Any coments, thoughts, ideas etc. are very welcome.