Oh, Dam! I almost forgot, "The pattern broad/plate is your freind, use it".
When you shoot skeet, at station #4 with the same lead, which house gives you the most trouble? Or when you pattern your gun, does the pattern show you are about 50% left/50% right?
1. The pattern board is your friend, use the Dam thing!!!
2. The maximum range of a firearm and/or cartridge, is usually measured in miles, and means nothing.
2a. The effective range of a firearm and/or cartridge is usually (the ability of the shooter) measured in yards, and means everything.