Scope swapping

[firedawg60]

The other day I took out two rimfires, one with a 4x fixed scope, the other with a 6-20x for a little range time. Out of curiosity, I switched the scopes to see what the one with the 4x would do with some more magnification. This combo has the scope canting noticeably to the left. So I put the 4x scope on the other, and it's canted noticeably to the right. What am I missing as to what would cause this when both are straight on the original rifles?

 

[rcmodel]

Assuming .22 tip-off mounts?

1. One set of rings is made differently enough they don't clamp down on the receiver grooves exactly the same.

Or:
2. One rifles receiver grooves are milled slightly off center with the center of the receiver.

Or.
3. One rifles receiver isn't setting in the stock perfectly vertical.

#1 is most likely.

rc

 

[firedawg60]

One set is CZ-USA factory and the other is Warne 7.3/22. I thought of your options 2 and 3, oddly enough didn't think of #1. With the amount of difference in the two, it kind of caught me off guard. Thanks for the thoughts.

 

[rcmodel]

Well the Warne 7.3/22 are for sure made for American standard 3/8" tip-off receiver grooves.

The CZ rings 'might' be for European 11mm dovetail if they are older rings.

http://cz-usa.com/hammer/wp-content/uploads/2014/04/Ringmounts_list_.pdf

Not much difference, but there is a difference.

What two guns were you putting them on?

rc

 

[jmr40]

Could also be differences in stock design. You might be canting one or both slightly, but in different directions and not realizing it.

 

[firedawg60]

CZ Scout and CZ453 Varmint - both 11mm. The Warnes fit the receivers like a glove. I guess that's why that aspect didn't dawn on me.