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Sako equivalent ring mount sizes?

Discussion in 'Tips and Tricks for gunsmithing your own Sako' started by BritinCH, May 9, 2022.

  1. BritinCH

    BritinCH Active Member

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    These are the original 1" rings and bases my my new A1 Vixen. She's got a budget 3-6x40 scope that I may replace with something higher end.
    As there are more 30mm options around my part of the woods I may also need to furnish her with new ring mounts to fit a 30mm tube.
    Does anyone know which of the Leupold Medium, high or super high ring mounts is closest to these? Same for the optilock ring mounts?


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  2. misako50

    misako50 Sako-addicted

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    Leupold ring mounts or the Sako mounts may all be available in "The ALPS.". What you have are Sako highs (vintage) and 30mm Vintage Sakos are like unicorns.
     
  3. BritinCH

    BritinCH Active Member

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    Yeah I've come to that conclusion over the weekend having reached all four corners of the internet hence the question about equivalent heights. I can't work out if the Medium or High Leupold ring mounts would put the centre of a 30mm tube at the same height above the bore.
     
  4. misako50

    misako50 Sako-addicted

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    I am mathematically challenged so I can't help there.
     
  5. stonecreek

    stonecreek SCC Secretary SCC Board Member

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    This is a bit of an apples-to-oranges question. The original Sako ring you have with the hole in the base (to reduce weight, not to sight through!) is the "high" model and is very closely equivalent to the "high" ringmouts by Leupold -- but only in the 1" diameter. If going to a 30mm tube (appx 1.18") then the larger tube may displace the total height of the mount by a small amount.

    Ultimately, it is the clearance of the objective bell above the barrel which is the controlling factor, not the diameter of the scope tube. If the scope you intend to use has an objective of 40mm or less then the Leupold "low" 30mm mount probably works. If greater than 40mm then you'll likely need the "medium". If 50mm or more, then the "high" will be called for. But good luck having your cheek in contact with the stock when your eye is aligned with the scope's sight picture if you have to use the "highs".
     
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  6. paulsonconstruction

    paulsonconstruction Sako-addicted

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    The "heights" of all the Leupold Ringmounts, both 1" & 30mm, are given on the Leupold website. They show them from top of dovetail to center of scope. If you have any math skills at all you can do the simple addition/subtraction necessary to figure out what the ring height is from dovetail to bottom of scope for both the 1" & 30mm rings. The "heights" of the original Sako ringmounts are also available online. For those computer challenged they are, from top of dovetail to bottom of scope tube, Low- 3/32", Med- 5/16", High- 15/32". You can convert these measurements to metric equivalents. All you have to do is set your scope on the dovetails with the scope bell touching your barrel. Then measure the distance between the dovetail & the scope tube & order the ringmount that gives you more distance. You can also measure the rings you have, if they work for your scope, & compare them to the published measurements & order the rings you need accordingly. If I recall correctly the 1" & 30mm Leupolds put the center of the scope at the same elevation. Your Sako high ringmounts (15/32") are very close to the Leupold high ringmounts (.501"). I know nothing about Opti-loks. Good luck!
     
    Last edited: May 10, 2022
  7. BritinCH

    BritinCH Active Member

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    Thanks.
    It’s not the maths but the data that was missing and my calipers which are currently in Spain!

    I want to know what will work before deciding what/if to buy.
     
  8. BritinCH

    BritinCH Active Member

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    For anyone looking to do similar. It is the eyepiece outside diameter rather than the Objective that is the most critical factor when moving from 1inch to 30mm tube.
    For the Sako High mounts the max Eyepiece OD is 44mm Max Objective OD is 59mm
    For Leupold Medium (which bring the centre of the tube down 3.5mm) max Eyepiece OD is 41mm Max Objective is 52mm

    Most 30mm tubes with up to 42mm Objectives Lenses will have an objective OD of 50-51 mm. However, the eyepiece OD will be over 41mm and the cocking arm will hit the scope.

    For my face the medium rings will put my cheek nicely on the rifle but the original SAKO Highs need a cheek riser which I would rather not have to fit.

    I used CAD to model several scopes to help me find one that will work.
     

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