I have a H&R Sporster single shot in .22 magnum with the H&R scope rail. I mounted a NC Star extended eye relief scope on it. I am not getting the accuracy that I should be getting. This scope is not a designated .22 scope and I am thinking the paralax of this scope is not set for the shorter range and quicker drop of the .22 mag. What ya think - replace it with a made for .22 scope ?