I have included two old posts - maybe between the two of them they will make some sense. also keep in mind my max range while hunting with an ordinary muzzleloader is 200 yards - give or take a bit. Also keep this in mind - this for hunting not for shooting targets the most accurate way!
I use a PBR sight in process (Point Blank Range) to sight a rifle in. I set the PBR range to 6" meaning I will never be higher or lower than 3" through a given range. The problem is you really need to know the velocity of the round you are shooting and the BC of the bullet at your altitude.
He is an example Ballistic Sheet.
The chart shows you with the
EXPECTED impact point point a various ranges. You can see the bullet is up approximately 3" at 100 and down 3" at someplace beyond 185 yards. From that point I do the shooting at the appropriate ranges to verify what the chart is indicating.
Works really well for me and hunting deer and elk. Not so good making money shooting targets.
Last edited: Dec 19, 2020
Keep Shooting Muzzleloaders - They are a Blast
Feb 28, 2015
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
ShootersCalculator.com | Point Blank Range Calculator
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...