Are there any standards for a 3/8 dovetail on a .22 rifle. I have measured the top of the dovetail at .501" the bottom around .375" and the height around .093" on my CZ 452. I bought the 452 at a local gun shop and bought 11mm Leupold rings to find they didn't fit so I brought them back and the shop ordered CZ rings despite me telling them that the rifle is a 452 American which has a 3/8 rail. I intend to fit the rings to the rifle with the measurements I have but would prefer to have the official dimensions.