The Right Way to Sight In Your Hunting Rifle
Before you bring your rifle into the field, bring it to the range and make sure it’s dead on.
Even as you read this, there are countless big-game animals living useful, productive lives because the people who shot at them didn’t know how to sight in a rifle—or neglected to sight their rifles in before the season. Don’t assume that your rifle shoots just where it did when you last put it away. Wood stocks love to absorb humidity, or dry out, causing a shift in impact. And don’t ever forget that shift happens!
Laminated-wood stocks are stable, as are synthetic stocks, and AR stocks, and chassis stocks. But scopes are not stable. That means if you dropped your rifle before you put it away, and meant to check it, and didn’t, you’re probably in for an ugly surprise. Or, if one of your friends dropped it and never told you, or if it traveled by air, the crosshairs are probably not where they should be.
How to Sight in a Rifle in 3 Steps
Step 1: Get Close and Bore sight Your Rifle
Don’t start off at 100 yards. Start off at 25 and use a target with a nice, big, black bull’s-eye, like the NRA B-8 rapid-fire pistol target, or the Birchwood Casey Shoot-N-C 17.25-inch target.
The cheapest and probably most accurate way to get on paper is to boresight the rifle. This involves removing the bolt, looking down the bore, aligning the bull’s-eye in its center, and without moving the rifle, dialing the cross hair into the center of the bull. Unless there’s something drastically wrong, this will get you onto the paper, and usually into the black.
Lever-actions, pumps, and conventional semi-autos don’t allow you to bore sight like this. So, what you do is either buy a bore sighting device or get 10 yards away from the target. Bore sighting devices sometimes work. Getting 10 yards from the target almost always works.
If you have an AR, you can bore sight by removing the bolt and carrier and taking the Upper off the Lower. Lay the Upper on sandbags, and proceed as you would with a bolt-action.
Unless your rifle has proven to be very accurate, don’t fire one shot before you adjust the scope; fire three. The center hole is where the rifle is shooting. Then make the proper scope adjustments, and remember that at 25 yards, you’ll need four times the number of clicks that you would at 100. With most scopes, if your rifle is hitting 1 inch to the left at 25 yards, for example, you’ll need to turn the scope’s windage knob not 4 but 16 clicks to the right.
Step 2: Fine-Tune Your Point of Impact
Once your rifle is printing tight groups in the center of the bull at 25, then you can move back to 100 and start shooting groups to fine-tune. This is also the time to try different loads to get the tightest groups possible.
Don’t let the barrel heat up. When it counts, you’re going to be shooting with a cold barrel, and very few rifles print to the same place with a warm or a hot barrel.
When you think the rifle is sighted in correctly at 100 yards, take it off the sandbag and slip your hand under the fore-end and fire a group. Some rifles are highly sensitive to the surface that supports them and will not shoot the same off a palm that they will off a hard sandbag. You need to know this.
If you’re going to limit your in-field shooting to 300 yards or less, the best zero is still 3 inches high of the point of aim at 100 yards. With most big-game cartridges, this will put the bullet 3 to 6 inches low at 300, which will put horns on the wall. (And you better check this by shooting; I’ve seen bullets drop like stones past 200 yards.)
If you want to shoot past 300, I’d either get a scope with a tactical elevation dial or one with a range-compensating reticle. Or one with both. If you choose the former, be sure that the elevation dial is accurate; there are plenty that aren’t. Nightforce, in a walk, makes the best. The new Leupolds that I’ve used are not quite as good, but they’re very good, and far better than the Leupolds of five years ago.
Range-compensating reticles work, but you have to find out where they shoot, and this can only be done by actually shooting. Mil dots are good, and so is the Leupold B&C reticle.
Step 3: Shoot, Shoot, and Shoot Some More
I can’t overemphasize the importance of doing the actual shooting. Factory drop tables are very accurate these days, but they’re not Real Life, and you need to find out what Real Life consists of if you want to sight in your rifle properly. Also, unless you’ve put in some trigger time, when the moment comes to shoot for meat, whatever you think you know will go right out of your head. And, you need to figure out how to compensate for wind, and its insane little brother, mirage. I can now shoot well enough that I can put 18 out of 20 shots in a 6-inch circle at 600 yards. But it took me six summers of intensive shooting, and who knows how many thousands of rounds of ammunition.
There are no shortcuts here; there’s nothing you can buy that’s going to guarantee your success past 300 yards. Absent putting in the practice time, you might as well throw rocks.