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#6085491 - 12/15/15 01:11 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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THF Celebrity
Registered: 09/16/09
Posts: 12537
Loc: Lewisville, TX
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If the rifle is zero'd at 100, the reticle cross hairs should also be at 100 yards. I bore sight many, many rifles the exact way you describe, and I often get it within a few inches of zero. I make sure the scope is dialed down to the lowest power setting when bore sighting in this manner.
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#6085499 - 12/15/15 01:13 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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Bird Dog
Registered: 07/21/11
Posts: 390
Loc: Brazos County Texas
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Was the windage set to neutral? You should have more R/L windage available if you put those crosshairs at neutral and then bore sight the best you can using the rear base (which I believe you wrote that you are using). Had that happen to me before.
g
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#6085525 - 12/15/15 01:20 PM
Re: Scope / Bore Misalignment
[Re: ChadTRG42]
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Woodsman
Registered: 05/19/12
Posts: 177
Loc: DFW
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If the rifle is zero'd at 100, the reticle cross hairs should also be at 100 yards. I bore sight many, many rifles the exact way you describe, and I often get it within a few inches of zero. I make sure the scope is dialed down to the lowest power setting when bore sighting in this manner. Same here, we usually have the rifle on paper when we bore-sight by looking down the bore of the rifle. That is why we are perplexed, the scope is zeroed at 100 yards but the bore appears to be pointing 5' to the left of the target bullseye. Maybe we are missing something simple but it seems odd to say the least.
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#6085587 - 12/15/15 01:47 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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THF Trophy Hunter
Registered: 11/11/07
Posts: 7876
Loc: Wise Co.
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What kind of rifle? Kinda sounds like the bedding may be really, really bad. But then again, a 2" group doesn't really seem to say so. Weird.
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#6085592 - 12/15/15 01:49 PM
Re: Scope / Bore Misalignment
[Re: glb1955]
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Woodsman
Registered: 05/19/12
Posts: 177
Loc: DFW
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Was the windage set to neutral? You should have more R/L windage available if you put those crosshairs at neutral and then bore sight the best you can using the rear base (which I believe you wrote that you are using). Had that happen to me before.
g We used the rear base to make large adjustments then fine tuned with the internal adjustment. The perceived issue is that when the rifle scope is zeroed at 100 yards it is not in alignment with the bore of the rifle. I realize that sounds crazy but it explains why we couldn't get the rifle bore sighted (at the range looking down the bore or with the bore sighting tool at the gunshop). We had to use a large sheet of plywood just to figure out where the bullet was impacting at 50 yards and make adjustments from there. I have never had to do that before. Could an improperly cut crown cause such an issue?
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#6085593 - 12/15/15 01:49 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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THF Celebrity
Registered: 12/16/08
Posts: 24104
Loc: Wolfe City, TX
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Rifle and scope are in fact zeroed. Obviously since the scope is allowing the rifle to hit where the scope is "looking", but on re-boresighting you're way off to the left. My bet is the scope has a major malfunction.
What scope is it?
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#6085604 - 12/15/15 01:54 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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THF Trophy Hunter
Registered: 11/11/07
Posts: 7876
Loc: Wise Co.
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I think a crown problem would disperse shots all over the place, but maybe not.
I had an AR that had a bad upper receiver and the barrel ended up pointed off to one side. Sighted in at 25 it would be off to the side about a foot at 100 yards. Sighted in at 100, it was off to the other side at 25 or 50. Bushmaster took care of it, no problem really, just a PITA.
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 It's not that liberals are not smart, it's just that so much of what they know isn't so.
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#6085605 - 12/15/15 01:56 PM
Re: Scope / Bore Misalignment
[Re: FiremanJG]
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Woodsman
Registered: 05/19/12
Posts: 177
Loc: DFW
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Rifle and scope are in fact zeroed. Obviously since the scope is allowing the rifle to hit where the scope is "looking", but on re-boresighting you're way off to the left. My bet is the scope has a major malfunction.
What scope is it? Correct, the bullet is impacting the target within 2" of where the scope is "looking". Pull the bolt and look down the bore and you would swear the rifle should be shooting 5' to the left. The scope is a Vortex Diamondback.
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#6085669 - 12/15/15 02:19 PM
Re: Scope / Bore Misalignment
[Re: RiverRider]
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Woodsman
Registered: 05/19/12
Posts: 177
Loc: DFW
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What kind of rifle? Kinda sounds like the bedding may be really, really bad. But then again, a 2" group doesn't really seem to say so. Weird. It is a Savage Model 11, 308 caliber.
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#6085676 - 12/15/15 02:25 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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THF Trophy Hunter
Registered: 11/11/07
Posts: 7876
Loc: Wise Co.
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You could always try another barrel since they can be changed readily.
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 It's not that liberals are not smart, it's just that so much of what they know isn't so.
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#6085752 - 12/15/15 02:56 PM
Re: Scope / Bore Misalignment
[Re: RiverRider]
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THF Trophy Hunter
Registered: 11/01/12
Posts: 8691
Loc: Lubbock, TX
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You could always try another barrel since they can be changed readily. This idea has promise.
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#6086121 - 12/15/15 06:44 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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THF Celebrity
Registered: 08/27/09
Posts: 11885
Loc: Forney, Tx
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Does the bases look like they are square with the receiver or pointed off to the side?
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#6086130 - 12/15/15 06:47 PM
Re: Scope / Bore Misalignment
[Re: Brandon S.]
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Extreme Tracker
Registered: 08/27/12
Posts: 4010
Loc: Watauga, TX
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Slightly bent barrel? If you stretch out past 100 what happens? Does impact move to the other side?
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