![]() ![]() This is from an Excel spreadsheet ballistic calculator. Note that my scope mount is a see-through, so I can use the iron sights under the scope if I’m close to the game. For iron sights, measure from the top of the front sight to the center of the bore, and for scopes it’s from the center of the front lens to the center of the bore. You also need to know the vertical distance of your line of sight above the center of the bore. This information is available from the manufacturer on the Internet. To do this, you need a ballistic app, program or spreadsheet or calculator, and the following information: caliber, weight in grains, muzzle velocity in feet per second (fps), and ballistic coefficient. But since no two bullets have the same trajectory, you have to calculate the zero range for your bullet. The good news news: Many hunting rifles will give you point blank range out to around 250 yards. So if your aiming point is at the center of the kill zone, and your bullet never passes 3 inches above or below your line of sight, you don’t have to adjust your aiming point. (Neck shots, headshots and spine shots will also stop a deer quickly, but are for accomplished shooters-missed shots are more common because they require highly accurate shooting.) On whitetail deer a safe kill zone is about 6 inches tall, and includes the heart and lungs. How does it work? The “kill zone” is where a bullet with sufficient energy, penetration and expansion should strike the game to ensure a quick, humane death. Without a good range finder, getting the range right is also chancy.īut fear not! If you know your weapon/ammo “point blank range,” you can aim at the center of your target-for this example, we’ll use the range of a whitetail deer’s “kill zone”-and be assured of an effective hit. ![]() Only in the two places where the round crosses your line of sight will the shot be exactly on target. At very close or very long distances, you have to aim high, and in between, you have to aim low. This is harder than it sounds, because you also need to know the range to the target. If you know the ballistics of your rifle/bullet combination, you can adjust your aim up or down to compensate. That means that your crosshair could be right where you want them on your target, but the bullet could strike too high or low, depending on the distance. If you read Richard Mann’s excellent “Ballistics Made Simple” article ( click here), you’ll learn that when you fire your rifle, the bullet rises and falls through your line of sight. Maximum Point Blank Range (MPBR) is simply the farthest end of that distance.Ī little “Ballistics 101” will help further our discussion. What is “Point Blank Range (PBR),” and what does it mean to you? Defined, point blank range is the range at which you don’t need to aim high or low to hit your aiming point. ![]()
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