zmason1002

This is a the way I sight in...


I have for years now especially with a ML used a system called Point Blank Range (PBR). For a muzzleloader I use a 6" PBR, meaning through a given range the bullet will never be more than 3" high or 3" low while sighting dead on or Point of Aim (POA).

Point-blank range is the distance between a weapon and a target of a given size its projectile is expected to strike without adjusting the weapon's elevation. Point-blank range will vary by a weapon's external ballistics characteristics and target chosen. A weapon with a flatter trajectory will permit a longer maximum point-blank range for a given target size, while a larger target will allow a longer point-blank range for a given weapon.

Here is a calculator I just found on the net.. and I am sure there are others

http://www.shooterscalculator.com/point-blank-range.php

In my case that means most of rifle will be about 3" high @ 100 and 3" low @ 175 to 90 depending on weight of bullet and powder charge or velocity. This little thing allows me to shoot 0 to 200 without much thought or scope adjusting.

This is a typical ballistic sheet on one of my loads with the PBR built in..



The chart shows my actual zero range is 160 yards and I can shoot to 196 yards and be 3" LOW. You can also the expected Point of Impact -POI at other ranges on the sheet

Hope this makes some sense...