Is there something wrong with these rings?...

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NVShooter

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I got these rings with an EE scope purchase, but in a box separate from the scope, just an extra the seller tossed in. I thought "great!" until I tried to mount the scope in them. The top/cap of the rings is pretty round, not perfect, but much better than the bottom piece. In both pictures, the pieces of the ring are just sitting level on a 1" scope tube, under their own weight. Is there a scope made with an oval tube? Ha! Or a tube with a smaller diameter than 1", maybe 7/8"? Both rings (all four pieces) are the same, just like what is pictured. What do you experienced guys say?

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Thanks for the suggestion. I have six scopes all with 1" tubes. I was swapping scopes around yesterday and they are all interchangeable on the various rings. I ran into a situation where I could use a different mount for a particular scope on a rifle it had not been on before. I looked around on my "optics shelf" and found these. I mounted the bases but when I lay the scope down on the bottom ring, something didn't seem right. I have since tried placing these rings on every one of my 1" scopes with the same result. Some tubes are a thou or so different from each-other but all result in the same circumstance.

The ring is fairly solid. Unless there is a tube slightly smaller than 1", I think using these rings would damage a 1" scope tube in a nasty way. Maybe a manufacturing aberration? If there is a smaller tube, then these are useful to someone and I can pass them on. Otherwise I should probably just toss them in the bin.
 
There's tubes with smaller diameters than 1",but,I don't remember which ones (Williams rimfire,maybe). I have a set of rings with an oddball size. I have no idea where they came from because the don't fit anything I have in use,now. Toss 'em in the parts bin. You never know when they'll come in handy.
 
They look like Weaver grand slams, and identical to a set I recieved with a used scope. I've tried a few scopes and they all look the same as yours. I'm gonna chuck mine in the bin. If you ever did use them, your scope would be marred but good. Too bad, because otherwise they seem like a quality ring.
 
NVShooter said:
I got these rings with an EE scope purchase, but in a box separate from the scope, just an extra the seller tossed in. I thought "great!" until I tried to mount the scope in them. The top/cap of the rings is pretty round, not perfect, but much better than the bottom piece. In both pictures, the pieces of the ring are just sitting level on a 1" scope tube, under their own weight. Is there a scope made with an oval tube? Ha! Or a tube with a smaller diameter than 1", maybe 7/8"? Both rings (all four pieces) are the same, just like what is pictured. What do you experienced guys say?

P1050080-sized.jpg

P1050079-sized.jpg
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I've used lots of the weaver grand slams. Can't say mine ever fit like that
On second look idk if there weaver grand slam as yours looks like both keepers are movable
 
Just spoke with my dad. Along with some of you, he indicated there are older (typically rimfire) scopes with smaller tube diameters. It seems he has a couple tucked away. I'm going to bring these rings over to his place and check the size. If you have some similar, don't toss them. At the least, drop them off for a gunsmith or at one of the tables of odds and ends at your next gun show. Someone with an older rig will surely appreciate them. I'll let you know the results from checking with my dad's scopes. Thanks for all the input.
 
or just buy a new set ... don't damage the scope tube with those; incidentally it is always informative to measure the diameter of a scope tube ... at various locations along the length... I have found surprising variations on the "1 inch" "theme"
 
Windage adjustable Weaver grandslams.

I've had about 6 sets of the GS's and have never seen that issue before.
 
So for all of you who care...I dropped into my dad's place yesterday and picked my way through his extensive scope selection. Jeeze...I thought I was glass junkie! Anyway, he has a number of smaller tube "22 scopes" he calls them. They measure 3/4" across the tube. Too small for these crazy rings I have. All of his other scopes have 1" or 30mm tubes. I did notice that some of his 1" scopes are closer to fitting these rings than other scopes, but still not close enough to take a chance on using without damage to the scope. So I put my micrometer on some of those 1" scope tubes. They were all around 1.002" to 1.004", so maybe these rings are exactly 1.000"...either that or my micrometer has a .004% error out to the 1" range. It was calibrated to zero correctly. Next step is to put the inside calipers on the rings and see what they come out as. Stay tuned...
 
9.3mauser said:
Those rings may be for 7/8" scopes. The Lyman Alaskan had a 7/8" tube, and Leupold did a reproduction of that scope a few years back.
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Finally got around to putting the inside calipers on the crazy scope rings and then I doubled-checked the caliper measurement by measuring the caliper with the outside micrometer.

Inside of the rings, from top to bottom is .990" with the rings held together, which is about right for a 1" scope, given that there is usually a bit of a gap.

Inside of the rings, at the sides of the rings, where they have to pass over the side of the scope tube is .975". Bigger than 7/8" but smaller than 1". In fact, I expect the same measurement on a "proper fitting" 1" ring would be over 1".

These are not "springy" rings. I certainly wouldn't want to force them over a scope tube.

Crazy...
 
if they are that close press them over a 1 inch bar, not a scope, maybe they got squashed in storage, 0.010 will easily open up, measure a few sockets and see how close to 1 inch you can get
 
laurencen said:
if they are that close press them over a 1 inch bar, not a scope, maybe they got squashed in storage, 0.010 will easily open up, measure a few sockets and see how close to 1 inch you can get
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Thanks for the tip...but the .990" measurement is top to bottom and will be larger when not screwed tightly together. I need them to open up greater than .025" (from .975"). Still might give your idea a try. They are pretty useless as they are.
 
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