G'Day Fella's,

Gryphon, Con has pretty well answered your question!

FYI, when ever I'm attaching a scope to anything with some amount of recoil (.30-06 and up), in addition to lapping the rings (that's normal for them all), I usually put Loctite 601 on both halves of the rings, prior to placing the scope in place. You need to place the scope in position first, to confirm eye relief. Whilst there, I put a piece of masking tape (on the scope) at the forward edge of where the scope ring is, then do as described above.

Hope that helps

Doh!
homer