Ruger 77/22 WMR scope won’t zero
#14049194
08/14/19
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Joined: Jun 2009
Posts: 237
misplacedinnebraska
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So a few years ago I bought a used zytel stocked 77/22 magnum. It came with a set of Ruger rings and a tasco pronghorn riflescope. I had shot it a few times and the tasco was zeroed. I decided that I wanted a leupold rimfire scope and bought one and mounted it. I can’t get near enough elevation to get to center. I’ve read some on a google search that this in known to be a problem with Ruger receivers being off some. I really didn’t like that information and proceeded to experiment. The rings do not fit all that well. One of the top rings has to be pushed down to sort of snap onto the scope tube. Doesn’t leave me with a warm fuzzy. So I swapped the rings front to back and the problem stayed. And for [bleep] and giggles I measured them with a caliper and they are within .004 “ of each other. Some had said to make sure they didn’t have high power rings. It bothers me the most because the tasco that I loathed so much had enough adjustment to zero but my leupold does not. I’m wondering if I could lap these rings and straighten them out but not sure it will make a difference because won’t the rings be aligned with each other and still not aligned with the bore? Also I read something briefly about the barrel might not be aligned correctly, can anyone shed some light on that? Thanks for reading.
Last edited by misplacedinnebraska; 08/14/19.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14049291
08/14/19
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Joined: May 2011
Posts: 9,019
OSU_Sig
Campfire Outfitter
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Have you tried other rings? Burris makes a ring set for Ruger rifles.
Shoot low Sheriff, they're riding shetlands.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14049363
08/14/19
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Joined: Dec 2013
Posts: 414
driggy
Campfire Regular
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Seems to me if it was fine with the Tasco, and the problem showed up when switched to Leupold, I'd try a third scope of know quality. If you don't have one, at least put the Tasco back on and see if it will zero again.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14049550
08/14/19
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Joined: Jun 2009
Posts: 237
misplacedinnebraska
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I haven’t tried another scope. I could probably do a bit of research and see how much each scope has for adjustment and compare. I’ll put the tasco back on tonight and report back.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: OSU_Sig]
#14049659
08/14/19
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Joined: Nov 2013
Posts: 13,842
Pappy348
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2013
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The Leupold ones are nice too. Think I still have a set of low blued ones. Warnes are also solid.
BTW, is it possible you mixed up the ring caps or reversed them? Probably not the reason for the POI problem, but maybe the issue with fitting over the scope tube.
Last edited by Pappy348; 08/14/19.
What fresh Hell is this?
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14049795
08/14/19
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Joined: Jun 2009
Posts: 237
misplacedinnebraska
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It is possible, but the one ring cap fits tighter than the other. I wouldn’t be opposed to buying a different set of rings. But would like to rule out an issue with the receiver first.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14051142
08/14/19
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Joined: Jun 2009
Posts: 237
misplacedinnebraska
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So here’s the scoop. While at work I read on the Leupold website that this is somewhat common. And to shim the scope in the ring as a correction. Once I got home I grabbed the Tasco set it back in the rings and it was on zero still for the most part with a ton of upward travel left should I have needed it. Set the leupold in and same trouble as before. It was odd that the ring caps fit fine over the Tasco and one cap doesn’t fit worth a hoot on the Leupold. So I measured them. The tasco is .003 less than an inch and the leupold is .004 more than an inch. The ring sort of snaps into place over the scope. So reading today some more on shimming scope and different material sources I found that my Costco milk jug is about .020” thick. Cut out a shin and it came to zero pretty handily. It still seems odd to me that this would happen and makes me think that I’d never want a Ruger high power if this problem is common. With any other base one could place a shim under a scope base and I would have preferred that.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14055132
08/16/19
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Joined: Nov 2006
Posts: 3,592
JimHnSTL
Campfire Guide
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It’s not a problem with any of my Ruger’s, both rimfire and centerfire. It seems to me to be more of a scope issue. However that aside, there are options out there. weigan makes a one piece base that uses the factory ring locations. https://www.jackweigand.com/ also, but harder to find anymore, Burris made signature rings for the Ruger that used the off set inserts but they are impossible to find.
Help keep our sport going. take a kid outdoors!
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14182943
10/06/19
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Joined: Sep 2002
Posts: 42
Plainsman
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Years ago it was common for guys to shim scopes in the rings, hence Burris creating scope rings with that capability. A friend of mine would shim with different thicknesses of aluminum. Guys doing this wanted to have the rings as close to center as possible with the rifle zeroed from my experience.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: misplacedinnebraska]
#14183234
10/06/19
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Joined: Aug 2010
Posts: 31,189
bsa1917hunter
Campfire Oracle
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So here’s the scoop. While at work I read on the Leupold website that this is somewhat common. And to shim the scope in the ring as a correction. Once I got home I grabbed the Tasco set it back in the rings and it was on zero still for the most part with a ton of upward travel left should I have needed it. Set the leupold in and same trouble as before. It was odd that the ring caps fit fine over the Tasco and one cap doesn’t fit worth a hoot on the Leupold. So I measured them. The tasco is .003 less than an inch and the leupold is .004 more than an inch. The ring sort of snaps into place over the scope. So reading today some more on shimming scope and different material sources I found that my Costco milk jug is about .020” thick. Cut out a shin and it came to zero pretty handily. It still seems odd to me that this would happen and makes me think that I’d never want a Ruger high power if this problem is common. With any other base one could place a shim under a scope base and I would have preferred that. What seems odd is the Tasco had no problem yet the Leupold had the problems, yet it's the rifles fault? Hmmmm... Things that make you go hmmmm... I've never had an issue with any Ruger integral ring system. I don't use Leupolds anymore either... Hmmmm
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. P BSA
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Re: Ruger 77/22 WMR scope won’t zero
[Re: bsa1917hunter]
#14183291
10/07/19
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Joined: Jan 2014
Posts: 3,053
jk16
Campfire Guide
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So here’s the scoop. While at work I read on the Leupold website that this is somewhat common. And to shim the scope in the ring as a correction. Once I got home I grabbed the Tasco set it back in the rings and it was on zero still for the most part with a ton of upward travel left should I have needed it. Set the leupold in and same trouble as before. It was odd that the ring caps fit fine over the Tasco and one cap doesn’t fit worth a hoot on the Leupold. So I measured them. The tasco is .003 less than an inch and the leupold is .004 more than an inch. The ring sort of snaps into place over the scope. So reading today some more on shimming scope and different material sources I found that my Costco milk jug is about .020” thick. Cut out a shin and it came to zero pretty handily. It still seems odd to me that this would happen and makes me think that I’d never want a Ruger high power if this problem is common. With any other base one could place a shim under a scope base and I would have preferred that. What seems odd is the Tasco had no problem yet the Leupold had the problems, yet it's the rifles fault? Hmmmm... Things that make you go hmmmm... I've never had an issue with any Ruger integral ring system. I don't use Leupolds anymore either... Hmmmm It is very likely that BOTH scopes are on the ragged edge of their lower elevation adjustment and the Tasco simply had a bit more left than the Leupold. And besidies sh*ttly machined factory rings , the older m77/22 Rugers often suffer from "barrel droop" in the reciever due to the V- Block barrel clamp at 6 o'clock ahead of the action. This is pretty common on Ruger 10/22s as well.. Given how short the front reciever ring is on the m77/22 rifles and the often sloppy slip fit of the barrel tendon into the action, it's easy to see how the barrel could be pull downward a few degrees in the front in the acton when tightened. Unfortunately, there are a LOT of opportunites for "stacking toletances" to rear their ugly heads on the m77/22 rifles .. and it ain't Leupold's fault. 
Last edited by jk16; 10/07/19.
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Re: Ruger 77/22 WMR scope won’t zero
[Re: jk16]
#14183402
10/07/19
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Joined: May 2005
Posts: 5,581
LeonHitchcox
Campfire Tracker
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Campfire Tracker
Joined: May 2005
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What jk16 said. Different scopes have different amounts of internal adjustment. I ran into a similar problem with a Ruger #1. For years it ran a K12 Weaver with no issues, but when I put a different brand scope on it I ran out of windage adjustment. Seems the new scope had very little adjustment. Had to go with windage adjustable rings.
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