:bigeyes: Just FYI....I decided to shoot my R61 I bought a few weeks ago....thank goodness it was in an armory....my gun stated it was a "9mmM" so I loaded it with 9mm Makarov; it fit perfectly in my magazine. Of course, the Makarov ammo jammed my gun. The techs who inspected and "unjammed" my gun stated that even though it is stamped "9mmM", my R61 is actually calibrated for 380 ammo, which also fits well in my magazine. Gun fires perfectly since. Just something I had to learn on my own...hopefully, this may help other R61 owners out there; just make doubly sure the ammo that particuliar takes.