Custome Servicer Bull Shizzle

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Bought a Bushnell Laser Boresighter, and while I had it in my .22 target rifle (in the shop vise), I rotated the boresighter, to see if it was really aligned to the bore. Wow, the dot went around in a 3" circle on the shop wall 30' away! Boresighter was tight in the barrel, with the .22 adapter on the end. Sent Cust. Service an Email, they replied" this is the way it was designed. Put the boresighter at the BOTTOM APEX OF THE BARREL, and adjust your scope to the laser dot". WHAT? Bottom apex?? Apex means the top!!! Bore is round!!! This is total BS. I see four tiny allen screws in the sides of the boresighter, will try to align the dot to the real bore center.:mad:
 
If the light on the wall...

...is at it's apex when the boresighter is on the bottom of the barrel, I would expect it to be working as designed. It must be trying to compensate for the scope height above the bore. That might make everything come out alright.

Jim
 
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I purchased one of these a few years ago. It too was not centered within the bore. I too prompted the manufacturer. When I was told to align the laser at the bottom I asked why the instructions made no mention of this when it was a key point in the correct use. They never did answer that question. The type of laser alignment tools that look like a cartridge and are loaded into the chamber seem to be centered.
Andy.
 
Bullets

Andy Cross said:
I purchased one of these a few years ago. It too was not centered within the bore. I too prompted the manufacturer. When I was told to align the laser at the bottom I asked why the instructions made no mention of this when it was a key point in the correct use. They never did answer that question. The type of laser alignment tools that look like a cartridge and are loaded into the chamber seem to be centered.
Andy.
Click to expand...

Drop due to gravity, light does not...or is not affected enough over our distances to be relevant. If a bolt gun, just pull the bolt, align on target and then adjust the scope to the same point. That's all a bore slighter is doing, but a bit higher $$. Greg
 
glp said:
Drop due to gravity, light does not...or is not affected enough over our distances to be relevant. If a bolt gun, just pull the bolt, align on target and then adjust the scope to the same point. That's all a bore slighter is doing, but a bit higher $$. Greg
Click to expand...

All I use them for is to get the rifle on paper. Some shooters actually try to sight in using them. That's not the point I was making. The point is no mention was made in the printed material that the point of light would not be in the centre of the bore.
Andy
PS As an optical engineer I am aware of the fact gravity has more effect on a bullet than photons.
 
I just

Visually bore sight my bolt guns and have never not been on the paper. I think bore sightseers are nice if you need them but aren't more than a tech alternative to using what God gave us. I find inserting my bore guide with its smaller than caliber hole can help beyond 100 yards. I'm surprised the mfg wouldn't be more specific, but if they are made in china and the instructions written there, well....
 
I suspect that they meant "vertex" rather than "apex" and meant the lowest point of the dot's travel.
 
"PS As an optical engineer I am aware of the fact gravity has more effect on a bullet than photons."

Yes, but you're talking with folks that can go all day about how much gravity droops a rifle barrel...just sayin'...:)
 
Bubba fixed it! Just tweaked/bent the bore insert, so now the dot stays in place as it's rotated in the barrel!(Within 1/2" at 30 ft) I wanted this thing to tell me where is the bore off to the lowest point, as I rotate my .22 BR barrel in Vee blocks. Theory is that the lowest point is the most accurate, for .22 RFBR. Finally got the wind to stop blowing, and fired a .25" 5 shot group in the 45 yd backyard range with Wolf MT. All vertical, from my new homebrew sporter off 2 sandbags. Suspect variations in grip might be the vertical...or the Wolf...or the loose nut behind the buttplate....
 
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