Al,

We checked them and the top(flat)of the base is about .004 less wide than a Davidson. They appear to be the same size as the Davidson/Kelbly but not quite. They are not 3/8". I've ordered a set from Kelbly's for a round action. That should take care of the problem.

Tightening the rings on the bases that came with the gun didn't help. They just wouldn't stay put. Thanks for the advice. --Greg