My 300 Win Mag shoots the 200 grain Nosler Partition best at 0.030” off the lands. I have tried 0.015 through 0.040” off and 0.030 was most accurate and is quite good (1.7” groups at 250 yards). None of the other seating depths tried were acceptable. Unfortunately my magazine box is too short for the cartridge loaded at that length. So I wonder if I could maybe find another sweet spot with the bullet seated deeper. Should I bother trying loads with the bullet seated deeper? If so what would you recommend for seating depth increments? Should I go in 0.010” or 0.020” or 0.040” increments initially or what? My box length is 3.6” long. I know that many 300 Win Mags have boxes only 3.38” long or so and yet presumably people can get them shooting well with a standard chamber (which would give them about 0.220” jump to the lands). Any suggestions? Thanks, Rufous.