With that cartridge, I'd see about getting a 30 MOA base, if not a 40. Ken Farrel has some...
You have the ballistics to shoot out to a mile... but you'll need more elevation than a 20 MOA base will give you.
Where will you find the opportunity to ever shoot a mile? Well... we'll be hosting a 1 mile shoot this spring, date to be announced later. Southwest Virginia... should be fun.