I had originally mounted my Red Dot from my 870 shotgun on my NEF Sportster Mach 2.... it left a lot to be desired as a sight for that type of weapon, but I did get a PD's nailed wit it.
At any rate, my new 3x9x40 came in Monday so I mounted it, sighted it in about 1.5" high at 50 yards and then the wife and I looked up a couple PD's before dinner....PD's didn't make it home to dinner. This is sure a neat little gun to plink with...has been deadly to every PD I have shot with it. All three were bang - flop situations with no run-a-ways.