Issues with offsetting scopes?

[Englishman 17]

Hi Gents.

Recently I have got a medical problem with my dominant eye (right) with Posterior Vitreous Detachment.
I am having difficulty in obtaining a good sight picture because I cannot seem to focus as before, so I was thinking of how to move forward by using my left eye and moving the Nightforce scope over by a few inches to the left at the same height as now and to still shoot right handed.
Now I have never seen this done here in the UK but someone over in your neck of the woods may have and I was wondering if and what are the major downsides to this if any?
The obvious one to me is the alignment of the centreline of the scope in relation to the centreline of the barrel and how is it possible to zero at say 100yds and then up to 1000yds? Now my mathematics/trigonometry is poor when it comes to trying to work out the obvious pitfalls.
So, if anyone has gone through this issue before and can let me know if it is possible to mount my scope to give a zero at all ranges then I would be very grateful.

 

[rkittine]

Geometrically there would be a new dimension when changing the convergence of sight line and bore lone when changing from 100 yards to 1,000. Would need an interesting mount that could be modified for both horizontal and vertical correction for required MOA changes. Maybe with Burris Signature Ring inserts?

Bob

 

[WayneShaw]

I have used my Hood scope checker many times. I may be wrong, but I don't think the mounting dovetails are angled, they appear to be parallel. Dialing in at 100 yards has never been an issue.

One more comment, I have no experiences with them, but there are scope mounts for rail guns that are several inches (maybe 5 or 6") higher than where the action/barrel is clamped. I bet those aren't offset.

 

[prwhite]

I have had right eye issues for about five years now, and offset my scopes to the left. Measuring the left offset of the scope and estimating some spin drift, I've established that about 1.75" right at 100 yards "should be" about a rough 1000 yard zero with a conventional rifle build. In my experience shooting F-class, that has worked out ok due to sighters being available. I think the only way to solve the problem would be to offset the butt of the stock to achieve perpendicularly of the bore and scope.

 

[gme]

I know several shooters that use offset scopes/sights, for known distance shooing there's no issues (besides physically adjusting to it), changing yardage require wind and elevation changes but just keep a data book, for UKD I wouldn't recommend it

 

[357Mag]

Englishman -

Howdy !

I have vitreous humor turning from jell towards liquid state, due to my having birthdays. Where the separation takes place, I am prone to ocular bleeding.

I am right handed, but my right eye is weak; and I’m really Lt eye dominate.......as a practical matter.

Yet, I still shoot right eye to the scope, and use Weaver offset scope bases to help me gain more clearance for the cup of my earmuffs.

I’ll send along a pic of the setup on my Marlin M-336XLR .35 Remington.

On my new CVA Hunter .35 Remington single shot, I am working on mounting the scope via use of the Left side of a “ quad rail “.
By mounting off the left side , the addition of scope bases puts the scope
further left than the set up on my Marlin did. I’m using an aluminum tubular adapter to accept the rifle’s barrel internally.... and then fit inside the quad rail. I’ll include a pic of the adapter on the gun.


With regards,
357Mag

 

[Ggmac]

Hi Gents.

Recently I have got a medical problem with my dominant eye (right) with Posterior Vitreous Detachment.
I am having difficulty in obtaining a good sight picture because I cannot seem to focus as before, so I was thinking of how to move forward by using my left eye and moving the Nightforce scope over by a few inches to the left at the same height as now and to still shoot right handed.
Now I have never seen this done here in the UK but someone over in your neck of the woods may have and I was wondering if and what are the major downsides to this if any?
The obvious one to me is the alignment of the centreline of the scope in relation to the centreline of the barrel and how is it possible to zero at say 100yds and then up to 1000yds? Now my mathematics/trigonometry is poor when it comes to trying to work out the obvious pitfalls.
So, if anyone has gone through this issue before and can let me know if it is possible to mount my scope to give a zero at all ranges then I would be very grateful.

If your scope is 1" to the left of bore and your poi is exactly 1" to the right of aim you will be correct ( except for spin drift and wind ) further out

 

[BoydAllen]

Problem solved. Watch the video. My friend Wally has an issue with his left eye having better vision and has been very clever about dealing with it.
https://www.targetshooting.com/video-library/

 

[gunsandgunsmithing]

I use offset rings regularly and have never noticed a problem.
I look at it like this...draw two straight lines from the centerline of the bore and the scope.....to infinity, separated by the amount of offset in the rings or base. Lets say the rings are offset .500. Without any angular change, the two points will be .500 apart from here to infinity.
Am I missing something?

 

[SEGARE]

Shoot with the other shoulder? I've done it enough to know that with some concerted effort I could become very proficient with my non-dominate eye.

 

[Englishman 17]

Hi Gentlemen

Just a word of thanks for everyone who has replied and offered the various solutions to my problem.
Having looked at those options it seems that by fitting the 45 degree offset scope bases and using my left eye this should do the job. So I have ordered them this morning and will give them a go but only once our range in the North of England can re open after the Corvid 19 becomes under control and I can shoot at 100 yards to get a zero and then shoot at either 600yds or 1000yds to see what I need to do to have point of aim and point of impact to converge without using up too much windage adjustment.

All the best guys and many thanks for taking the time to reply.
Stay safe and good shooting to all.

Les

 

[LarryDScott]

Harrells has offset rings. LDS

 

[243winxb]

Off Axis- reminds me of sighting in a Win m94 30wcf top ejection carbine with a side scope mount. A learning experience.



If bullet drop can be calculated, can a bullet that keeps going left be?
Rifle has to be sighted in at the longest distance you going to shoot at. Then work backwards, recording settings/data.

 

[Dusty Stevens]

Ive seen railguns with scopes mounted 12”+ above and to the left of the action. Also seen a bunch with 2 scopes mounted like that. Mine is 6” or so above the action

 

[Albany Mountain]

What kind of Dr. is best for "issues" of the eye. I keep complaining to the eye glass "doctors" and they just blah blah blah poo pah it off as everybody has one good eye and one bad. I don't know of cataract surgery will solve my problem or not, I am not quite there yet for medicare coverage but would pay for it if it fixes my resolution issue in my right eye. Otherwise I would have to go to offset in the future.

 

[Dusty Stevens]

Offsetting scopes is done to keep less cheek pressure on the stock not for shooting with the opposite eye. If you need to swap eyes you should look into swapping to a left handed setup and retrain yourself

 

[mikecr]

Be sure to pay special attention to level

 

[carlsbad]

for this to work the rifle has to be perfectly level for each shot.

 

[Englishman 17]

Be sure to pay special attention to level

Thanks for the tip

 

[Englishman 17]

for this to work the rifle has to be perfectly level for each shot.

Will do, thanks