I bought a set of 30mm to 1" adapters made by Barrett...
Considering the rings were $100, spending $40 for the adapters was worthwhile.
Nothing made by Barrett constitutes taking a "chance"...
http://www.barrettrifles.com/p-1621-...-set-of-4.aspx
'Course, if you've got $30 rings, this option is a non-starter...