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scope shimming old school
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i've got a ruger #1 30-06 with a scope that has the 50mm front end so had to go with high bases. shot it yesterday for first time after installation. with elevation knob at lowest setting it hits approx 15" high at 125 yds with a 150 gr sp. years ago i would have cut up a coors can and shimmed the back bottom of the rear ring, and done the same to any gaps caused in the front ring. but times change and am looking for any better way from the actual experts to get this cat skinned. thanks
 
Posts: 1532 | Location: south of austin texas | Registered: 25 November 2011Reply With Quote
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Cardinal rule: always shim the rear base/mount in the direction you want the bullet to go. Sounds like you are going the wrong way with a shim.


Jim Kobe
10841 Oxborough Ave So
Bloomington MN 55437
952.884.6031
Professional member American Cusom Gunmakers Guild

 
Posts: 5500 | Location: Minnesota | Registered: 10 July 2002Reply With Quote
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You've probably already addressed this but ring sets for #1's are the same height while ring heights for 77's are two different heights.
Maybe wrong set of rings???
 
Posts: 312 | Location: Alaska to Kalispell MT | Registered: 06 January 2005Reply With Quote
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This brings back memories. I was in an auto parts store . Two guys were arguing about sight adjustments...drawing diagrams, etc...got a little heated!!

I whipped out a business card and tastefully explained that many folks have been through this same issue, so;...gunsmiths came up with a simple rule :

Always move the rear sight in the direction you want the bullet to go. I didn't even mention that the front sight was just the opposite because these guys were already close to a rucking fage..
 
Posts: 3449 | Location: Phone: (253) 535-0066 / (253) 230-5599, Address: PO Box 822 Spanaway WA 98387 | www.customgunandrifle.com | Registered: 16 April 2013Reply With Quote
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I have had good results with the Burris XTR Signature rings. The have Pos-Align Offset Inserts that have a lot of adjustments.
 
Posts: 2173 | Location: NORTHWEST NEW MEXICO, USA | Registered: 05 March 2008Reply With Quote
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quote:
Originally posted by Jim Kobe:
Cardinal rule: always shim the rear base/mount in the direction you want the bullet to go. Sounds like you are going the wrong way with a shim.

yes but i am talking about the rings not the base. so if i want the POI to be lower i want the front of the scope to be lower and the rear to be higher so the shim would go between the bottom of the scope rear and ring. or under the rear base. scope needs to be rear higher and front lower. que no?
 
Posts: 1532 | Location: south of austin texas | Registered: 25 November 2011Reply With Quote
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quote:
Originally posted by john c.:
quote:
Originally posted by Jim Kobe:
Cardinal rule: always shim the rear base/mount in the direction you want the bullet to go. Sounds like you are going the wrong way with a shim.

yes but i am talking about the rings not the base. so if i want the POI to be lower i want the front of the scope to be lower and the rear to be higher so the shim would go between the bottom of the scope rear and ring. or under the rear base. scope needs to be rear higher and front lower. que no?


I think you have it backwards.
 
Posts: 1058 | Registered: 04 January 2005Reply With Quote
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Yes. Of course with the scope reticle at the lowest setting your bullets will hit very high. Whilst the rule for rear SIGHTS is to move the sight the direction you want the bullet to go, scopes do not follow that rule.
It's easy to visualize.
 
Posts: 17090 | Location: USA | Registered: 02 August 2009Reply With Quote
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The OP might consider taking or sending the package to a qualified gunsmith. . He will (or should) set the internal adjustments at midpoint, then modify whatever is necessary so it at least boresights dead on. You'll then have plenty of internal adjustment
 
Posts: 3449 | Location: Phone: (253) 535-0066 / (253) 230-5599, Address: PO Box 822 Spanaway WA 98387 | www.customgunandrifle.com | Registered: 16 April 2013Reply With Quote
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after hunting season this year i either put on new or switched around scopes on 3 rifles. i always use the Bushnell Professional Boresighter with the 3 diff (according to caliber) arbors. two needed very little adjustment at the range. this one is trying my patience. however, after todays responses, the light suddenly switched on in my haid. thanks
 
Posts: 1532 | Location: south of austin texas | Registered: 25 November 2011Reply With Quote
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Our shop has experienced several Ruger rings that had the half-moon recoil tabs oversized. This caused them to ride up when tightened and changed scope settings a great deal.
 
Posts: 3664 | Location: SC,USA | Registered: 07 March 2002Reply With Quote
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Move rear sight in the direction that you want the bullet to go (this also means rear rings or bases).

Move front sight to chase the bullet, meaning move the front sight or front base or ring towards the bullet Point of impact.

Hip
 
Posts: 1816 | Location: Long Island, New York | Registered: 04 January 2008Reply With Quote
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quote:
Originally posted by dian1:
You've probably already addressed this but ring sets for #1's are the same height while ring heights for 77's are two different heights.
Maybe wrong set of rings???


Happened to me with my first number one.
 
Posts: 19350 | Location: wis | Registered: 21 April 2001Reply With Quote
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quote:
Originally posted by p dog shooter:
quote:
Originally posted by dian1:
You've probably already addressed this but ring sets for #1's are the same height while ring heights for 77's are two different heights.
Maybe wrong set of rings???


Happened to me with my first number one.
 
Posts: 1532 | Location: south of austin texas | Registered: 25 November 2011Reply With Quote
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quote:
Originally posted by john c.:
quote:
Originally posted by p dog shooter:
quote:
Originally posted by dian1:
You've probably already addressed this but ring sets for #1's are the same height while ring heights for 77's are two different heights.
Maybe wrong set of rings???


Happened to me with my first number one.


damn i'll have to check that
 
Posts: 1532 | Location: south of austin texas | Registered: 25 November 2011Reply With Quote
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quote:
Originally posted by Bobster:
Our shop has experienced several Ruger rings that had the half-moon recoil tabs oversized. This caused them to ride up when tightened and changed scope settings a great deal.

that too!
 
Posts: 1532 | Location: south of austin texas | Registered: 25 November 2011Reply With Quote
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I read recently about another person who had the same problem. Sent the rifle back to Ruger. The quarter rib was out of spec and ruger replaced it if I recall correctly. If you don't want to send the gun back and the rings are correct look into the Burris Signature rings with the inserts that can be replaced as was mentioned earlier.
 
Posts: 376 | Location: USA | Registered: 26 March 2016Reply With Quote
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Clear me up on this, the Ruger #1 has screw attached quarter rib for a scope base, correct?? I suppose one could shim it but it would look tacky??? You cannot shim a Ruger ring as it has a button that goes in a slot..

Sounds like to me Ruger should give you a new barrel as it was installed cattywhumpus or is just bored less than true..or you have the wrong rings, your rings on a ruger #1 should be thesame...


Ray Atkinson
Atkinson Hunting Adventures
10 Ward Lane,
Filer, Idaho, 83328
208-731-4120

rayatkinsonhunting@gmail.com
 
Posts: 41812 | Location: Twin Falls, Idaho | Registered: 04 June 2000Reply With Quote
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i took the scope out of the leupold rings to shim it and noticed the front of the scope came out of the front ring bottom as if it was catching. in and out, it WAS catching a bit. i used to have many moons ago the steel rod with the handle on it that was used with grit to smooth and align rings. no telling where it is. i broke down and bought a set of warne rings, medium instead of high. got it mounted with no catch etc and with a hairs breath plus 2 to clear the bell of the scope from the base front. now shoots on target as is supposed to with plenty of adjustments both ways. did not shoot for accuracy this time, used "siter" rds, just to see where the rds would hit on the gongs and paper. much much better and as it should be.
 
Posts: 1532 | Location: south of austin texas | Registered: 25 November 2011Reply With Quote
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Hopefully a hair's breadth clearance at the objective is enough. Recoil inertia could see a big, long bell flex down, cf a car body under braking. If it then contacts the barrel, strange outcomes may result
 
Posts: 4937 | Location: Melbourne, Australia | Registered: 31 March 2009Reply With Quote
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quote:
Originally posted by Duane Wiebe (CG&R):
This brings back memories. I was in an auto parts store . Two guys were arguing about sight adjustments...drawing diagrams, etc...got a little heated!!

I whipped out a business card and tastefully explained that many folks have been through this same issue, so;...gunsmiths came up with a simple rule :

Always move the rear sight in the direction you want the bullet to go. I didn't even mention that the front sight was just the opposite because these guys were already close to a rucking fage..


Duane, I had that happen to me in AIT ("Advanced"? Infantry Training) when an instructor was trying to explain how to adjust the sights on the M16. He didn't understand the difference between adjusting the rear sight and the front


Anyone who claims the 30-06 is ineffective has either not tried one, or is unwittingly commenting on their own marksmanship
Phil Shoemaker
Alaska Master guide
FAA Master pilot
NRA Benefactor www.grizzlyskinsofalaska.com
 
Posts: 4191 | Location: Bristol Bay | Registered: 24 April 2004Reply With Quote
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The simplest terms that I have come across in my 68 years of shooting are;

Move the rear sight in the direction that you want the bullet to go!

AND (from archery)

Front sight-----Chase the Arrow (Your pin is the front sight)

Hip
 
Posts: 1816 | Location: Long Island, New York | Registered: 04 January 2008Reply With Quote
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Bottom line is I would almost bet a black land farm against an old set of shoes, you got the wrong rings..I believe you stated you had to purchase the high rings, Its a 77 therefore the rear ring is the highest of the two, on a no.1 the rings are the same height...and of course both rings need to bottom out..

Iron sight solution is as described in earlier posts here..You should never need to shim a Ruger or any rifle with integral bases..


Ray Atkinson
Atkinson Hunting Adventures
10 Ward Lane,
Filer, Idaho, 83328
208-731-4120

rayatkinsonhunting@gmail.com
 
Posts: 41812 | Location: Twin Falls, Idaho | Registered: 04 June 2000Reply With Quote
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