If you shoot long range targets with cant scope mounts, please use this MOA offset cant calculator to estimate the cant clearance from the barrel.
This only serves as rough estimate. The loss in height value represents #mm height clearance between the objective bell and the top of the barrel (or rail).
Calculate MOA Offset Cant Clearance
Please measure your particular rifle setup using the illustration below:
To calculate scope height clearance from the barrel, please click here