I need less eye relief

[hillbillydruggist]

Sorry for bad pic

 

[BoydAllen]

I was taught to divide the objective into the power
Addendum- no hair splitting just overview

Think about that for a bit. For the same effective objective diameter, the higher the power, the smaller the exit pupil. Just check out some manufacturers' spec's. Lets do a couple of examples. With the same 40mm objective, the exit pupil for a 6X would be 40/6 = 6.7mm. On the other hand if we do the same calculation at 24x we get 40/24= 1.7mm.

 

[JFrank]

Sounds about right
Sightron 10-50x 60 at full power the exit pupil would be 1.2

 

[savagedasher]

Check with the scope manufacturer they give the eye relief
Most changes with power
Then your have two choices
Get the scope mount that let you get
It
Or. Adjust the stock
Most inexpensive have short eye relief

 

[Bart B.]

I was taught to divide the objective into the power
Addendum- no hair splitting just overview

then a 10 power scope with a 50mm lens would have a 2/10ths millimeter exit pupil, about .0078 inch.

 

[Papa Charlie]

I would look at an extended ring that moves the scope back as was suggested earlier. It is the simplest and cheapest way to make the adjustment without having to modify your scope or rifle.

 

[JFrank]

then a 10 power scope with a 50mm lens would have a 2/10ths millimeter exit pupil, about .0078 inch.

I'm kinda busy today Bart"
Maybe call Sightron and take it up with them.
J

 

[JFrank]

Sorry for bad pic

No worries
If that were me I would loosen the rings at the bases and slide it back and forth until I had a decent sight picture.
Can you download the specs

 

[Bart B.]

I'm kinda busy today Bart"
Maybe call Sightron and take it up with them.
J

Another way to calculate exit pupil is to divide the eyepiece focal length in millimeters by the telescope's focal ratio (f/stop) like camera lenses have. If the 10X scope eyepiece has a 50mm focal length, its objective lens combined system (all lenses in front of the second focal plane) has a 500mm focal length. If its main objective lens diameter is 50mm, the f/stop equals 500 mm focal length divided by 50 mm lens diameter or f/10. 50/10 = 5mm exit pupil. Same as a 50mm lens divided by 10 power

 

[hillbillydruggist]

I would look at an extended ring that moves the scope back as was suggested earlier. It is the simplest and cheapest way to make the adjustment without having to modify your scope or rifle.

i'm waiting on a reply from Ruger & Leupold, but i think that is what i am going to do

 

[savagedasher]

Looks like the front ring can move backwards almost 1/2”

 

[Zero333]

https://www.jackweigand.com/Ruger-M77-MKII-Rifle-Scope-Mounts-No-Drill.html

https://www.opticsplanet.com/leathe...nd-short-action-one-piece-picatinny-base.html

https://www.mountsplus.com/ruger-m77-accessories.html

 

[fkimble@charter.net]

Why not just side the scope forward a little and use the nice big eyebox that the 6x scopes have?

Frank

 

[Bojo]

I'd just put a longer tube scope on it that better matches the long action.
If u cannot make it fit you correctly u sure are going to have a hard time shooting it accurate. Some short tube scopes just do not fit right on long action guns and buying special rings at extra cost is not something I look for in a setup like that.

 

[jamesh]

I use Ruger offset scope rings on my Ruger #1s
http://shopruger.com/searchscoperingresults.asp?dept=249&txtsearch=4KO*

 

[johara1]

He makes no sense, it is back as far as it will go .... you need more eye relief. you need extension rings facing the rear to get the scope back further. if I'm not mistaken I thought the old ones had a second place to the rear to mount the scope rings, unless it isn't that old. I have used 6 x 42's my whole life since they came out great scope.... jim

 

[hogpatrol]

i'm waiting on a reply from Ruger & Leupold, but i think that is what i am going to do

What was the disposition of this issue? Would like to know as it would help others confronted with the problem.

 

[johara1]

What was the disposition of this issue? Would like to know as it would help others confronted with the problem.

The only problem is the stock is too long and from the crappy pic. it doesn't look like a 6x42 Leupold and I would bet the length of pull is well over the 13.5" norm.... jim

 

[hogpatrol]

The only problem is the stock is too long and from the crappy pic. it doesn't look like a 6x42 Leupold and I would bet the length of pull is well over the 13.5" norm.... jim

I'd put a different scope on it, one that works, and call it history.

 

[johara1]

Wow. none this has any thing to do with the problem. eye relief on the scope is what is, measure from the trigger to the back of the butt plate. There is the problem if it is over 13.5", all 6 power leupold scopes are over 3.5 " eye relief. I had a ruger 77 in 308 and I had a 3 power Leupold on it and I still cut the stock off to a 13" pull to see a full scope. The cheapest fix is a saw...... jim