having owned a Mercury many years ago, and unable to find a sensible priced good condition example, is an Airporter more or less accurate (with the right pellet)?

I have heard that the Airsporter loading tap is an area of inefficiency and power loss compared with the Mercury, but, the Mercury can have problems with barrel lock up with wear on the hinge pin and breech seal. Im not looking for ultimate power but reliable consistent accuracy.

thoughts and comments welcome.