Well it's not a custom and not what you called a big bore but is set up a bit different than most. Using a VGM mount and a 2 1/3 - 8 Leupold pistol scope.
Used for testing and experimenting long range shooting with a revolver. Last pin setting on the VGM mount is set for 500 yards. It's only a pip squeek 44 magnum but is amazingly accurate even at those distances. Plan this summer to redo the pin settings and keep stretching it out.