I have the MK II Target as well and really enjoy it. When I use the really cheap stuff (Remington bulk), I get more FTFs though. It gets pretty dirty after only a hundred rounds or so, that may have something to do with it too.
That thing is a big chunk of steel. You might try a box or two of CCI Stingers, they're a bit hotter and may put a bit more cycle into your action.
Best of luck.