11mm or 3/8” Scope Grooves

R

Roamin_Wade

Moderator
Are 11mm and 3/8” scope ring grooves the same? Put another way, can I install rings labeled 11mm on 3/8” grooves or vice-versa? I googled it but it started talking about grooves being cut at different angles so I decided to just ask in here so I can get firsthand knowledge. Thanks...
 
Warne makes rings that can go either way simply by changing the orientation of the blocks on the bottom of the ring base. There is a difference in size and this comes up with European rifles more than here in the U.S. Example: Anschutz and CZ are 11mm. Warne p.n. is 721 and they come in different heights.
 
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