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This is somewhat connected to the present disscussion of old scopes but I decided to post it separately.
I plan to scope an old Mannlicher sporter using a side mount by Williams (the idea is to allow clip-loading). If I use an older scope with elevation adjustment only, is the Williams mount capable of suitable windage adjustment?
With kind regards,
Jani

Hello
According to the 1976 Williams catalog
" All Williams QC Mounts now have an eccentric bushing with a collar that can be turned with a screw driver of similar object, to obtain preliminary adjustment and insure a good mounting job. It is not necessary to remove bushing to turn it, and it is not necessary to remove mount to obtain windage adjustment."

So, if you have a Williams QC Side Mount SM-MS-52/56 with the Offset A rings, perhaps, possibly, maybe.

BUT I would suggest these are only rough windage movements and not fine sighting in movements. You may have to shim the mount to get exactly what you want.

Mike

And expect your windage to be off a fair amount as you shoot at different also! I own an old Marlin Ballard with side mount Stevens scope, and it's sighted in at 100 yds. It strikes quite a bit off horizontally as the distance gets farther or closer.

Thank you both.
So I will rather return to my plan A, which is using a scope with windage adjustment buit in; I have an old Nickel 1-4x with windage knob on the left side which should allow clip loading on the right side.
I plan to sight it in at 70 meters; I am quite curios what this will mean for shooting at say 25 meters, and 200 meters...
With kind regards,
Jani

There is a good resource here => http://handloads.com/calc/index.html

Unfortunately, not metric but you should get close. It does not open correctly with Firefox but IE works. Haven't tried any other browser.

Knowing bullet diameter, weight, shape and velocity, one may set the zero to almost any distance and see the theoretical flight path. Because my closest range is only 50 yards, I use it quite a bit for initial sight in.

Cheers!

For the last few years I have been trying to cope with loss of vision in my right eye. I have tried to learn to shoot left handed, but I have also attempted to modify one of my rifles to allow shooting off the right shoulder, but aiming with the left eye.

Using my Griffin & Howe Springfield, I modified the top slide of the side mount using rings meant for the M1C sniper scope, offset to allow for clip loading.

Using both techniques, I accounted for nine deer this season, six shooting left handed and three with the modified Springfield. It is sighted in at 100 yards, and the horizontal deviation at 150 yards is insignificant on a target the size of a deer. This is how it looks:


There is enough clearance to allow for clip loading, if I should so desire.

DOH! After reading xausa's post it finally dawned on me the impact concern was side-to-side vs. drop. (Note to self: drink coffee BEFORE typing.)

I would think, absenting wind, it should be pretty much straight trigonometry. So, with a 70 meter zero, offset at 140 meters would be almost exactly the same as the offset at the bore. Other yardages should be close to a simple proportion. Probably not 'exact' in a careful scientific context, but certainly close enough for critters.

And sometime I rotate the scope 90 degrees using the windage for elevation and the elevation for windage. Work quite well when you need access on the right side of the scope.
Mike

The issue is similar to what SxS double rifles have with regulated barrels. Need to figure out where the bullet's path intersects, which for your gun/scope is 75 yds. presently. Unlike a SxS, we can adjust our POI with the scope. How far off can't really be calculated from where I'm sitting, as I don't know how far off the barrel's centerline your scope is. Without knowing the offset, there's no way to calculate how far off laterally the strike will be at various distances.
I'd simply say that you need to spend some range time on paper at the various distances, and that will answer your question better than I can.

A scope offset to the left enough to allow for clip loading should result in some difference between POA vs. POI in the horizontal but I can't think it is that big of a deal @ anything but extreme range because the US M1D sniper rifle used the same setup.