Gunsmithing Bore sighters

[thefiremeister]

I was looking at getting a Bore sighter. The lasers seem pretty self explanatory.

The other old school bore sighters I'm not so sure about. I was looking at a Bushnell bore sighter that has the adjustable arbors. It has the sighter part attached to the arbor that sits above the barrel. From the picture it looks like one end of a scope.

So how does this type work? It seems to me the bore sighter would have to take into account the distance from the center of the bore to the center of your optic and the distance from the end of the scope to the bore sighter to get the same angle you would have at 100 yards.

No two rifles are really set up the same so how close can you get with some thing like this?

 

[johncamino]

Re: Bore sighters

I'm actually a fan of the Leupold zero point. It works pretty good for me, and when I move scopes around I can get back on target quickly (usually within an inch vertical and horizontal change)

 

[thefiremeister]

Re: Bore sighters

Thats what I'm trying to accomplish. It seems like I'm always wanting to move some thing around.

 

[johncamino]

Re: Bore sighters

The Leupold is basically a prism, and as long as you place it in the right ballpark on the muzzle the image is the same. Its pretty repeatable, at least on my rifles. I just write down the location of the crosshairs on the grid, and when I move a scope around, I move the reticle back to that location and I'm pretty close.

 

[frog5215]

Re: Bore sighters

A benefit of a collimator is that you can't see a target with the collimator in place.
I've seen photos of at least one perfect banana peeled barrel from a laser the moron forgot to remove from his muzzle before he loaded up.

 

[thefiremeister]

Re: Bore sighters

I assume the Bushnell is basically collimator?

I kind of like the idea of not having more stuff thats battery operated and I can bore sight the rifle just about any place, but..

How does the scope focus on the collimator? I'm guessing it doesn't so what do you actually see??

 

[Sean the Nailer]

Re: Bore sighters

You actually see a "grid" which is legible through the magnification on the scope.

 

[thefiremeister]

Re: Bore sighters

I feel like I'm not quite getting it on one so if you guys could type slowly...

If I'm reading the info right I see the Leupold Zero Point is adjustable so you can guesstimate the height of the scope and get close to centerline height.

On the Bushnell the height looks like it is fixed, so if my scopes are different sizes and mounted on different rings will I still be able to get on paper at say 50 yards using either bore sighter?


And I'm talking standard paper not refrigerator cardboard box paper.

 

[bignada]

Re: Bore sighters

Bushnell 74-3333 is much more than just bore-sighting tool.
The grid collimator enables you to align your reticle square, do box testing, verify canted base moa correction, and gives you reference to diagnosing turret movement problems.

Keep a log for each rifle? Use the collimator to note reticle position for your zero. Shifting scope from one rifle to another can be very precise using the collimator if you know the zero set points for each rifle. Collimator can also diagnose scope mount problems. Picatinny base system ought to interchange scopes without affecting reticle squareness on collimator.

Bushnell 74-3333 will save you hours of time and money, plus give you diagnostics capabilities you will otherwise only be guessing at.

 

[cal50]

Re: Bore sighters

+1 on the Leupold zero point. Its worked out pretty well on anything I have put it on. It does not take up much space and does not need a set of bore spuds.

 

[thefiremeister]

Re: Bore sighters

It would be great to have some diagnostic capabilities.

My luck with equipment has never been very good so having a tool to help figure out whats wrong would be a step in the right direction.

 

[thefiremeister]

Re: Bore sighters

I just ordered up the Bushnell 74-3333. I'll write up a little some thing when I get it. I got a scope i'm pretty sure is junk and I'll compare it to a known good one.

 

[Retoocs]

Re: Bore sighters

I have one, but don't think it is worth the money. I rarely ever use mine.