13 yard sight-in
I was given a copy of the Pennsylvania Game News, August 2003, edition and inside there is an article written by Dave Ehrig, about keeping your powder dry & Shooting straight. He states, “Begin your shooting close to the target. I like to zero the rifle at 13 yards, which not puts my first shot on paper but immediately shows if I’M vertical alignment. It’s easy to raise or lower the group by varying the elevation of the sights, but horizontal alignment is a lot more difficult to correct. With a 13-yard zero the bullet will print one inch high at 50-yards, hit center at 75 yards & drop an inch at 100-yards.
This system works with rifles in caliber’s .45 to .58 if the muzzle velocities are between 1,000 and 2,000 feet per second. These are typical velocities for the hotter hunting loads of black powder pushing a patched round ball. If you a are shooting a heavier lead slug, such as the T/C Maxi–ball, or one of the many sabotted rounds, your ballistics will be similar if your muzzle velocities are more than 1,ooo feet per second.” The author then goes on to say you can also sight your rifle in at 40-yards. This will put your bullet on the same spot at 80 yards, At 60 yards the bullet will be one inch high.