Re: 300 win mag and 215 grain bergers
I can't tell you how far off the lands I am. I just set them at mag length. My gunsmith modified my mag to give me more room but I'm still not out to the lands. I started at 73 grains of H1000 (using Fed. 215 primers and Norma brass). I worked up to 77 grains and got a slight ejector mark. Shooting one each of 74, 75, and 76 gave me a group under 1/2 MOA. 3 shot groups of each of those loads each printed right at 1/2 MOA. I'm loading those 3 loads up and will test at 500 and 1000 and check for vertical dispersion. Sorry I can't help with the seating depth but I've shot the 180 hybrids in my 7mm Mag and now these and neither seemed to care how for off the lands they were.