Bushnell Magnetic Boresight

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I just bought one today. Haven't used it yet, but I was wondering if anyone has any comments or suggestions for tricks.
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We sell almost all of the boresighters currently available and in my opinion for the money ($42) it is the easiest to use and way faster than the laser system. If the most repeatable accurary is what you are looking for then we use the Bushnell optical boresighter with three expandable arbors and one fixed .17 arbor, $110.oo , part #74-3333( we use this model almost exclusively in our shop). Phil.
 
P of PDent said:
We sell almost all of the boresighters currently available and in my opinion for the money ($42) it is the easiest to use and way faster than the laser system. If the most repeatable accurary is what you are looking for then we use the Bushnell optical boresighter with three expandable arbors and one fixed .17 arbor, $110.oo , part #74-3333( we use this model almost exclusively in our shop). Phil.
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+1

Have one of those... absolutely satisfied with this set up. :cool:
 
So what's the purpose of those things? Just getting your scope to the adjustment zone? I usually just look down the bbl and align the crosshairs with what I can see down the tube....
 
Eyeball boresighting can work just fine, if the design allows you to see through the barrel. An optical boresighter can be very convenient indoors. I personally am a bit leary about the sharp little spring fingers pressed against the bore; if the sighter turns over they are going to get scraped across the lands. Personal thing, but I won't use one on a quality barrel. And I do own one. The magnetic sighters, or ones using non-expanding arbors can avoid this situation.
There is a common assumption that a boresighter can actually be used to sight in a rifle, and that it is not necessary to actually fire the rifle. This is nonsense, but a boresighter can get the first shot pretty close to the point of aim.
 
I have one and have been using it for about 4 years and like it. What I Like about it is after boresighting then live fire on the range. I make a record of where the crosshairs align on the grid so after a mishap or rough trip into hunting camp I can check if the scope has been jarred. The thing is after sighting in on my rifles the crosshairs rarely are centred on the grid good insurance for not much money and no batteries.
 
I have one, and I like it just fine. It's quick and it's all I need to get my shots on paper. After that it's up to me to tune in the scope.
 
Bore sighter

I will not use a metal bore sighter for the very same reason. Considering the last point of impact is the muzzle end of the bore why would you take the chance of marring it? It is not even recomended to run a cleaning brush from the muzzle end. Better safe than sorry, there are quite a few quality magnetic product such as Leupold.
 
If anyone is concerned about placing anything metalic in their bore (other than bullets) then you should not use a cleaning rod/ brush/jag to push through or pull back into the muzzle. I agree that careless use of an arbor may cause some damage but I think this is extremely unlikely. When I place an arbor (expanding type) in the muzzle I have it turned down to it's minimum diameter and use my fingers to guide it into the opening. I have mounted scopes on very expensive and accurate rifles (we mount several hundred a year) and have never once been challenged on this procedeure or in fact any adverse conditions that I have caused to the accuracy of the firearms in question. It's your guns and you can be as careful as you want to be but in reality I think that using an arbor with reasonable care will have no impact on the accuracy of the gun. The fixed arbor systems have a springy bronze bushing that is softer than the barrel and while I am not as comfortable with this system in compressing it through the muzzle I still believe this will also have no effect on the accuracy. I don't like the fixed arbor system as much as the expanding arbor as it is slightly offset in the bore and won't be as accurate. Just my thoughts...Phil.
 
Colt Canada representative at the Canadian Law Enforcement Games strongly recommended against the use of expanding finger arbors. They have observed that the chrome plating in their barrels can be damaged.
 
With respect to Colt Canada having issues with expanding arbors damaging the chrome plating I wonder what boresighter they have been using ? I have never been able to get any arbor (fixed or expanding) style boresighter to work in any AR 15 or M16 rifle due to the high mounting position of the scope relative to the bore. At best we use one of the magnetic boresighters to just barely get high enough to adjust the optics. I would think that more damage to the Colt bores are from having BFA's (blank firing attachments) on the rifle than anything else. Phil.
 
Colt doesn't use this sort of boresighter. The representative did not recommend their use, because of risk of bore damage, mentionned that the fingers could scratch a chrome lined bore. Of course, some users can be pretty ham-handed. Bushnell makes an adapter that allows their boresighter to be used with rifles with high sights, see through scope mounts, etc.
 
tibbettsistough said:
I will not use a metal bore sighter for the very same reason. Considering the last point of impact is the muzzle end of the bore why would you take the chance of marring it? It is not even recomended to run a cleaning brush from the muzzle end. Better safe than sorry, there are quite a few quality magnetic product such as Leupold.
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You don't put the magnetic boresighter into the end of your barrel though. It's a flat piece of magnet, it sits across the bore, not it in.
 
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