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November 15th, 2017

Bright Bargain: Laser BoreSighters Under $15.00

Sportsman's Guide laser boresighter bore sight chamber lazer
With good factory rifle ammo costing $1.00 per round — a Laser BoreSighter could pay for itself in just a couple range sessions.

Laser BoreSighters — fitted to your chamber — help you get on target more quickly, particularly with factory firearms. Just activate the unit, slip it into the chamber and look for the red dot on the target. The laser dot is about 2″ in diameter at 100 yards, and is visible even in full sunlight. Right now you can get HQ Issue BoreSighters for just $14.99 at Sportsman’s Guide (member price is $13.49). These units have a durable brass metal body and the battery will run an hour. Boresighters are offered for numerous popular rifle cartridge types including: .223 Rem, .22-250, 6.5 Creedmoor, .308 Win family, and .30-06 (full list below). Sportsman’s Guide also offers Pistol Laser BoreSighters for $17.99 (pistol chamberings: .38 SPL/.357 Mag, .40 SW, .44 Magnum, .45 ACP).

Sportsman's Guide laser boresighter bore sight chamber lazer

In-chamber BoreSighters are much safer than the kind that you insert in the end of the barrel (or attach to muzzle). If you forget your laser bore-sight placed in the end of the barrel, and then fire a round, you can blow up your barrel and/or suffer serious injury — it HAS happened,.

Rifle and Shotgun Cartridge Types:
.223 Rem
.22-250
6.5 Creedmoor
7mm Mag (also .264 Mag, .338 Mag)
7.62×54
.30-30
.303 British
.308 Win (also .243, .260, 7mm-08)
.30-06 (also .25-06, .270 Win, .338-06)
.300 Win Mag
20 Gauge Shotgun
12 Gauge Shotgun
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May 17th, 2015

Embarrassing Moments: Shooting Chrony Bites the Dust

“Shooting Chrony” is a product name. “Shooting Chrony” should not describe (post-mortem) what you have been doing to your chronograph. Sooner or later all of us may make a mistake, and ventilate our chronograph. With luck, the bullet just “wings” your chronograph, and the damage is minor. But if you hit the unit smack dab in the middle, you may have to retire your chrono for good.

A while back, Forum member Jeff M. (aka “JRM850″) experienced a “low blow” that put his Shooting Chrony out of commission. With tongue firmly in cheek, Jeff started a Forum thread entitled Chronograph Not Picking Up Shots in Bright Sunlight Anymore. Looking at the photo below, the problem is obvious.

accurateshooter.com target chrony shoot chronograph damage chrono

This was Jeff’s first chrono kill in 23 years of use, so we shouldn’t be too critical. Jeff explained: “I didn’t realize a friend was shifting from a 300-yard target to 100 yards.” The agent of destruction was a low-traveling 58gr V-Max running at 3415 fps. What happened? Well, when one is shooting at 300 yards, the trajectory will be higher than at 100 yards. We should say, however, that this may have been a low shot, or the 100-yard aiming point may have been placed lower to the ground (closer to the bottom of the target frame), as compared to the 300-yard aiming point.

(more…)

Permalink News, Tech Tip 12 Comments »
September 10th, 2010

Dead Simple 4-Shot Sight-In for Hunting Rifles

Here’s a simple procedure that lets you get a solid zero for a hunting rifle in just four shots. Of course you probably want to fire a few more rounds to confirm your zero before you head off to your hunting grounds, but this will let you get on-target with a minimum amount of time and ammo expended. (This assumes your scope is securely mounted, and the bases are not drastically out of alignment.)

1. First, remove the bolt and boresight the rifle. Adjust the position of the rifle so that, looking through the bore, you can see the center of the target with your eyes. Secure the rifle in the rests to maintain its position as boresighted. Then, without moving the rifle, center the reticle. That should get you on paper. With the rifle solidly secured in front and rear rests or sandbags, aim at the center of a target placed at your zeroing distance (50 or 100 yards). Confirm there are no obstructions in the barrel! Then load and fire one shot. Then, return the gun to the exact position it was when you pulled the trigger, with the cross-hair centered on the target as before.

2. Locate, in the scope, where your first bullet landed on the target. Now, while you grip the rifle firmly so it doesn’t move, have a friend adjust the turrets on your scope. While you look through the scope, have your friend turn the windage and elevation turrets until the cross-hairs, as viewed through the scope, bisect the first bullet hole on the target. In other words, you use the turrets to move the center of the reticle to the actual position of shot number one. Dial the crosshairs to the hole — don’t move the rifle.

3. After you’ve adjusted the turrets, now re-aim the rifle so the cross-hairs are, once again, positioned on the target center. Keep the rifle firmly supported by your rest or sandbag. Take the second shot. You should find that the bullet now strikes in the center of the target.

3-Shot Zero

4. Take a third shot with the cross-hairs aligned in the center of the target to confirm your zero. Make minor modifications to the windage and elevation as necessary.

5. Now shoot the rifle from a field rest (shooting sticks, bipod, or rucksack) as you would use when actually hunting. Confirm that your zero is unchanged. You may need to make slight adjustments. Some rifles, particularly those with flexy fore-arms, exhibit a different POI (point of impact) when fired from a bipod or ruck vs. a sandbag rest.

If you recently cleaned your rifle, you may want to fire two or three fouling shots before you start this procedure. But keep in mind that you want to duplicate the typical cold bore conditions that you’ll experience during the hunt. If you set your zero after three fouling shots, then make sure the bore is in a similar condition when you actually go out hunting.

Permalink Hunting/Varminting, Optics, Shooting Skills 7 Comments »