Re: Setting up a 300 RUM
The 20 MOA rail should be enough to get you to 1500 with a 100 yard zero. With the RUM a 40 MOA base may not let you zero at 100. Your scope should have 100 MOA total adjustment so on paper after the 40 MOA base you would still have 10 MOA of adjustment to play with but it doesnt always work that way. I have 20's on my rifles and am looking at going to 30's but I am using Leupold scopes.
44.5 grains RL-15