Howdy team. I'm new to the forum and wanted to ask a sighting in question for open sights. I recently purchased a Springfield M1A precision in 6.5 Creedmore. The gun is comfortable to shoot although the precision stock is taking some getting used to. I want to zero for 100 yds. Could someone tell me how many clicks on the rear should I come up from winding the adjuster all the way down? I realize that some guns in different calibers would be different than mine but I am into conserving ammo which is hard to find these days and I also want to be ready for the zombies.