danno1
Member
Like some feed back on those Lazer Bore Sighters. How accurate are they?
Lazer Bore Sighter
- Thread starter danno1
- Start date
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I bought one off of Amazon for around $10 but I haven't taken it to the range yet. I bought it just to get me on paper at 100 yards when mounting a new optic. The club range I shoot at has fixed distance lanes so not having to get on paper at 20 yards then move down to the 100 yard lane to sight it saves a lot of time.
JaPes
Member
I have one you shove into the barrel. All it does is get my first shot on paper. I then make adjustments. With a sighting target, I get dialed in within three rounds.
Laser bore sighters, the kind that fit in the chamber, seem to be pretty accurate with respect to the bore. The problem is, the point of impact is always higher than the bore sight, and there is parallax between the scope and the point of impact at distances less than 100 yards.
The usual rules apply when bore sighting - support the stock, not the barrel, and keep a good cheek weld and the butt tight in the pocket.
The long and short is, use the laser sighter to get on paper at 20 yards or so (impact will be about 8" higher), tune it up at 20, then move out to 100 yards or more. A small error at 20 yards, parallax or otherwise, amounts to a big error at longer range. A small error at 100 yards amounts to a small error at 20 yards or 200 yards.
The usual rules apply when bore sighting - support the stock, not the barrel, and keep a good cheek weld and the butt tight in the pocket.
The long and short is, use the laser sighter to get on paper at 20 yards or so (impact will be about 8" higher), tune it up at 20, then move out to 100 yards or more. A small error at 20 yards, parallax or otherwise, amounts to a big error at longer range. A small error at 100 yards amounts to a small error at 20 yards or 200 yards.
Here is a novel way to use a laser bore sighter to get you on paper at an extended range. I've done this successfully in my backyard. Once I got to the range it was real close to a true 50yd/200m zero.
Mount a reflector to a fence or on a stick. Measure a 40yard distance from the reflector. Insert the bore sight and aim it at the reflector. You will get instant feedback from the reflector when the laser beam hits it and reflects back. Now adjust your sights/scope so that the cross hair, red dot, etc. lines up with the reflector at the same point as the bore sight beam. You will know when you are lined up because you will see instant feedback from the laser's reflection. Voila, you have a close 50yd zero.
You can use the same procedure for getting close to a 100yd zero by measuring a 55yd distance from the reflector and using this procedure.
The 40yd and 55yd distances were calculated using trajectory table from XM193 ballistics data.
Mount a reflector to a fence or on a stick. Measure a 40yard distance from the reflector. Insert the bore sight and aim it at the reflector. You will get instant feedback from the reflector when the laser beam hits it and reflects back. Now adjust your sights/scope so that the cross hair, red dot, etc. lines up with the reflector at the same point as the bore sight beam. You will know when you are lined up because you will see instant feedback from the laser's reflection. Voila, you have a close 50yd zero.
You can use the same procedure for getting close to a 100yd zero by measuring a 55yd distance from the reflector and using this procedure.
The 40yd and 55yd distances were calculated using trajectory table from XM193 ballistics data.
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Mr. P
Member
just remove the upper, steady on bags, look down the bore and adjust scope to bore....
this will get you close enough at fifty yards to finish dialing your scope in, with just a few rounds
P
(this is for an AR, correct?)
this will get you close enough at fifty yards to finish dialing your scope in, with just a few rounds
P
(this is for an AR, correct?)
Martimus
US Veteran
I have and use a Leupold magnetic bore sighter. It's not totally accurate but it gets me on paper from the onset. In my opinion it was totally worth the cost.
it also works with Bolt Actions!
In addition to the obvious use of getting on paper when sighting in a new optic I'm looking forward to using the boresighter in positioning my chronograph. Should be a lot faster to hold up a piece of paper between the skyscreen supports and center the laser dot rather than having to keep going back and forth between the chrony and behind the bench.
