PacWest Outdoors: Sighting-In Made Simple

Five simple steps to long-range accuracy in the Golden Age of the rifle

By Gary Lewis

This is the Golden Age of the rifle. Never before have good rifles and rifle scopes been so affordable and accessible. Today’s optics are far superior to the glass we used 20 years ago and a scope can be tailor-made for an individual to wring astonishing accuracy from his or her rifle. A hunter can buy premium off-the-shelf ammo that, under the right conditions, is capable of minute-of-angle accuracy.

But all the advancements in manufacturing are no substitute for time at the shooting bench. Rifle, optics and cartridge have to be harnessed in a pre-hunt ritual we call sighting-in.

Bore-Sighting Isn’t Good Enough

At the sporting goods counter, a hunter can have his new scope bore-sighted by the same fellow who sold it to him. The technician uses his eye or a laser to align the scope with the bore. Bore-sighting saves a little time at the range, but it is no substitute for sighting-in. A bore-sighted rifle will probably be ‘close,’ but close might mean that the bullet strikes within three feet of point-of-aim at a hundred yards. That’s not good enough when a big buck stands up across the canyon or a bull elk steps into a clearing 200 yards away.

Most rifle scopes have two turrets – one for windage (to move the bullet impact left or right) and one for elevation (to move impact up or down). Remove the turret caps and the crosshair can be adjusted by inserting a coin or twisting the dial clockwise or counter-clockwise. Most scopes are calibrated such that one ‘click’ equals an adjustment of 1/4-inch at 100 yards.

All Ammo Is Not Created Equal

Sight-in with the ammunition you’ll take on the hunt. Don’t bring bargain-basement bullets to the range when you plan to use premium projectiles in the field. Downrange performance is likely to be very different. You can use the cheap stuff in practice if you want, but to establish accuracy, you want to use the hunting bullet.

Adjust the scope up or down to bring the ‘target’ at the bore into line with the crosshair.

And one box of 20 rounds is not sufficient. Take at least two boxes to the range and have another set aside for the hunt. If you’re buying factory ammo, make sure the lot numbers match.

Here are five simple steps to take to make sure that your rifle is sighted-in before a deer or elk hunt.

1. Bore-sight it. Set the gun in a vise or bed it on sandbags. Point the muzzle in a safe direction. Remove the bolt and peer through the bore at a target and adjust the scope settings left or right and up or down to bring the crosshair into line with the bore. A laser bore-sighter may be used to good effect during this step. Just remember to remove the device before inserting ammunition.

2. Dry-fire it. Make sure the barrel is free of obstructions and pointed in a safe direction. Replace the bolt, set the safety and practice mounting the rifle to the shoulder. Flick the safety from ‘safe’ to ‘fire’ and, using the pad of the index finger, take the slack out of the trigger. Have a partner watch to make sure the trigger finger is not transmitting flinch to the end of the barrel. When you’re comfortable with the trigger and flinch is not an issue, put the gun on the bench. Note: Centerfire rifles are not damaged by dry-firing. And dry-firing is good practice. It helps the shooter gain familiarity with safety and trigger without burning expensive ammo. Don’t dry-fire a rimfire, shotgun or a muzzleloader.

Bore-sighting is a service offered by better gun shops. Here, a technician makes an adjustment, using a bore-sight tool. But boresighting is only the first step to sighting-in a rifle.

3. Bench-rest it. Create a solid rest for the gun from sandbags or use a bipod (only use a bipod if you plan to hunt with a bipod). Settle in behind the gun, snug it against your shoulder and settle your cheek on the stock. Don’t grip the fore-end. That’s what the bipod or the sandbags are for. Use the off-hand to stabilize the stock.

4. Establish the 25-yard zero. Set a target at 25 yards and fire three rounds to establish a group. Adjust the crosshair to center the group around the bulls-eye. This may take several adjustments and most of a box of ammo.

Anticipated recoil translates to flinch. When sighting in, or in practice, use ear protection and watch your groups tighten.

5.Tune the 100-yard group. After establishing a 25-yard zero, set a target at 100 yards and fire three rounds to establish a group. Depending on your hunting style, you may want your 100-yard group to impact three inches above the bulls-eye for a zero closer to 300 yards. Fine-tune the zero from the bench then replace the scope turret caps. The gun is sighted-in.

Now it’s time to practice. Shoot off-hand, from improvised rests, from sitting, kneeling and prone positions. Use a bipod and shoot from shooting sticks. Shoot at close range and out to 300 yards and beyond.

This is the Golden Age of your rifle. Learn how to make it perform and your seasons will be golden.

To order a signed copy of Hunting Oregon, send $24.85 (includes shipping) to Gary Lewis Outdoors, PO Box 1364, Bend, OR 97709 or visit www.GaryLewisOutdoors.com.

Mikayla Lewis recovered from shooting over this buck with the first shot to connecting on the second when the buck stopped broadside.

**Notes: • When shooting from a bipod, don’t grip the rifle with the off-hand, instead, use the off-hand to stabilize the stock at the butt. • Hunting with a bipod? Sight-in with a bipod. Anytime changes are made to the rifle, scope, ammo or the shooting style, head to the range for another sight-in session to fine-tune accuracy at long range. For this hunt, the 30-06 was sighted two inches high at 100 yards. For the uphill shot at 215 yards, the hold was dead on.

Trouble-shooting on the bench

The bench is the best place to work the kinks out of a big game rifle.

Sometimes groups go gunnysack. The Flinch is the biggest obstacle to accuracy, but you can control it by practice. After you’ve eliminated the Flinch as a factor, there are several ways to troubleshoot big groups.

Stringing is a common problem. Bullets impact on the target in a vertical string, which indicates that the barrel is coming into contact with the stock. The ideal is to have a gap, about the thickness of a piece of paper, between barrel and stock. There are several ways to correct the problem, but they’re best left to a gunsmith.

Scopes can fail and the best time for them to fail is in practice. Once, preparing for a hunt in the Far North, a scope went south on me. I discovered the problem when the 100-yard groups opened from 1.5 inches to 1.5 feet. Better that it happened at home than on the hunt.

When groups change dramatically or are hard to control, loose scope bases or scope rings may be the culprit. Make sure the mount and ring screws are tightened. I use blue Loc-Tite to keep the screws from rocking out during recoil.

Ammo may be the culprit. Modern rifles should hold a 100-yard group inside three inches. Due to factors like twist and barrel weight, some ammunition doesn’t shoot well in some guns. The closer you get to a one-inch group at 100 yards, the better. If groups are unacceptably large, try a different bullet.

-Gary Lewis