Ultimate load is determined by you! Its the load that suites your intended purpose. Work your loads up to get to that point.
Do you need 1/2" 5 shot groups at 300 yards?
If your plugging song dogs then a consistant 4" groups at your max comfortable shooting distance would be a great place to start at.
Take a look at some load data for the type of bullet you want to use in your cal.
Most accurate loads will be with an O.A.L that gets the bullet the closest to the lands, or the max length your mag will allow.
Start at the min load listed and work your way up a grain of powder every 3 rounds until you start getting close to your goal.
Then go with .5 grain increases or less to tweak even more.
