doublegunshop.com - home Forums Thread Like Summary - Windage adjustment query

This .300 Savage Model 45 is fitted with a Geco branded scope. According to the Internet these post war scopes with this style of elevation turret cap was made for various German retailers by Schmidt and Bender in their early days.

windage adjustments are in the rear mount by 2 opposing screws. The rings are 3.375 apart (centre to centre).

At present it is shooting 4.5 inches right at 100 yards.

Do any forum members have any experience in knowing how much in Minutes of Angle a half or full turn by the pushing screw (after slackening off the opposing screw) will shift the MPI?

Parabola,
Unfortunately, having had experience with this type of scope, I can see the type of mounts use do not adjust easily. The easiest solution would be to change to Redfield type or similar mounts with adjustments built into the rear mounts. Failing this, you can resort to filing the dovetails to move the scope in the desired direction. To move the point of impact to the left, move the rear of the scope to the left, or the front of the scope to the right. If necessary, you can move both front and rear of the scope. The rifle was made without having been drilled and tapped for mounting screws and it may have been drilled improperly. It is also possible to move the bases by opening the hole(s) in one or both of them and shimming one side. It is often surprising how little the scope has to be moved to sight it in.
Mike

You can use the screw pitch to determine the feed of the screw per revolution.

Steve Earl may produce some rings that can be adapted to your mounts if needed. Here is is website

https://www.steveearleproducts.com/

Parabola,
I can only see one side of the rifle, so your information is better than mine. I still believe there are not "non-pushing" and "pushing" screws in each mount, rather it looks like there is only one "clamping" screw with a "nut" for each mount.
Mike