it is true what the said about 22 rim fire ammo. Its made to fit all guns and may not perform the best in your own gun.
I would try it to see if it would improve performance.
the 5-6 weeks for delivery sucks.
"http://www.gunblast.com/Paco.htm"
Edit: opps, I mean this one:
"http://www.gunblast.com/Paco-Flatface.htm"
I dont see why you can just get a set of flat cutter from CT for like 5.99, and then take a piece of round stock and drill out the center to fit the .22 to the right depth. You could even use a piece of wood and glue a washer to the top.
Unless Im missing something here.