I have and shoot from a few cans of 173 grn Match ammo that came from surplus in the enbloc clips. Stuff shoots great! M2 ball in the same rifle produces a 3 to 4 MOA group (off sandbags) at 100, while an eight round group of the Match stuff can be covered with a half dollar. HUGE difference. Only a couple thousand rounds down range, but nothing bad yet. This is with an all correct and seemingly original '43 springfield withe the unmodified oprod and a shortfork follower. Maybe I've just been really lucky.