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#614834 05/14/22 05:31 PM
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OK--the 1952 era M70 in .220 Swift project is coming along, over and above the crazy ammo pricing and shortages in some of the older once popular varmint loadings. .220 Swift and .257 Roberts at the head of that parade. But the older Weaver 1"3x9 with parallax adjusting 50 mm bell parallax goes from 50 to 1000-- all blued steel, no model number marking, but it has the "widefield" rear optic lens (like the Redfield "Widefield" and the windage and elevation have the radius rimmed in brass, with std threaded covers-- Here's my problem-- At 50 yards on std. sight-in targets, windage is 100"% "dead nuts on"--but elevation with Remington factory 50 grainers is not right-- 4 inches low, shot after shot, shooting off a sandbagged rest.and- the elevation adjustment is "maxed out"- no more movement available, except, down, which just increases the problem I am currently facing with this set-up-- any suggestions from the cognoscenti hereabouts?? Thanks-- RWTF


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This is the German style mount?

I went through this with a Weatherby. Their rifle, their mount. Best they could come up with was a shim.

A Leupold mount fixed it.


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Obviously that scope is waaaayyyyy too modern for a 1952 Model 70. You need a Weaver K8 or for the hard core a Unertl Varmint or Fecker "Woodchucker."

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what rings and bases??

Might put front ring in rear if Weaver style

Last edited by skeettx; 05/14/22 09:56 PM.


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I thought you were discussing a rifle you intended to equip with a Buehler mount in the rifle section.

Apparently not. My error.


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Shim in the bottom of the rear ring. Don't use any more ammo, just bore sight to get in the bullseye.

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I think I have an older pre-74? Weaver-- and Weaver rings and 2-pc. bases. When I bought this .220Swift about 2 months ago, from Jay Schacter"s Vintage gunshop in GR- I asked the gunsmith (Kevin Duchene) about a used Unertl-- he had one, but told me that to mount on my M70 .220Swift, it would have to be "adapted to take the larger front bell, and moved forward. Yes, I thought about using a Buehler one pc. base and either Buehler or Leupold 1" rings-- but I got a good deal on the older Weaver, with the 2 pc. bases and rings-- Just for the "heck of it", I'll survey the ebay and other internet sales web sites, and see if I can find an identical set of Weaver bases and rings for sale, with pictures , for reference.

FWIW, I still have the Buehler one-piece mount base that I bought from a gentleman from TX-- with box and instructions, If I should ever decide I do not need it, I'll list it for sale for the same price I paid him for it--Not sure yet. Thanks for the input. RWTF


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Suggest that before you shim that you centralise elevation adjustment ( wind all the way down and half way back).


Then set up a tall 50 yard target with an aiming mark at the top, and fire 1 or 3 rounds to measure total drop at 50 yards(1,800 inches).

Divide drop in inches by 1,800 and multiply by distance in inches between centres of your scope rings will give you a ball park figure for thickness of shim to insert between bottom of scope tube and the top of the lower rear scope ring.

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I shall do this, Parabola-- I recall in my 80 year old brain a way to "re-adjust the elevation' and you explained that in easy terms for me to grasp. Do you mean a single shim, as I read Eightbore's sage reply, and at the bottom of the rear ring?-- that seems to make sense to me. What do you recommend I use for shim stock? My first thought might be a feeler gauge, marked in thousands of an inch, and flexible (assuming .010" as a "starting point"--but I can also gauge fine emery paper, and waterproof it, cut to bend to the OD of the scope tube..

I've probably said it before, but IMO it bears repeating: what a wealth of gun knowledge and willingness to share that info exists amongst the membership of this Forum.. RWTF


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Sliced up Coke cans work pretty well.

Last edited by Parabola; 05/15/22 08:41 AM.
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