|Rifle Sights And Bullet Trajectory:|
1. This first thing to know when sighting in a rifle is that all rifle sighting systems give you a point of aim on any target.
2. The second thing to know when sighting in a rifle is that all rifle sighting systems compensate bullet drop.
3. The third thing to know when sighting in a rifle is that a bullet constantly drops once leaving the rifle barrel, the arc that it drops in is the bullet trajectory.
Rifle Sight-In Procedure:
Step 1: Place your target at exactly 50 yards down-range, (quality rangefinders) offer a good quick reference if in doubt about distance from target, be sure that your down-range area is clear and safe to shoot. Wear ear and eye protection while shooting. Always use a target that you can clearly see with your sight system, preferably with 1" graduation grid marks.
Step 2: Go to your shooting position, load your rifle with one shell at a time as you will need to shoot at least 3 rounds of ammunition for a group to assure everything is accurate and tight on the rifle. Line up your sights correctly and fire one accurate round. Clear your spent rifle cartridge case, wait approximately 1 minute to cool rifle barrel. Repeat this procedure for three rounds of ammo.
Step 3: Make an exact measurement from the center of your group to the center of your target make your windage and elevation adjustment accordingly, if you need to go left or right and you have windage adjustable scope bases, use the windage screws on the base, rule of thumb for windage adjustment, if your bullet impact is to the left side of target center loosen the right rear windage screw on the base and tighten the windage screw on the left rear side of the base.
Step 4: Fire three more rounds to confirm your setting, if all is well and you have centered your group move on to step 5. If you are not satisfied with the accuracy of your ammunition at this point go no further until you have the ammunition you are happy with.
Step 5: You have now established a 50 yard reference zero point, next you have to do bullet trajectory plotting to see if this zero point is what you want for a true rifle zero. Bullet trajectory plotting is nothing more than shooting at targets at various distances and recording the bullets impact at those distances. If you want a more precise sight-in for hunting various animals, try a rifle sight-in for hunting.