• Like the 9x18 Makarov, these were imported back in the 1990's with lots of cheap ammo that quickly got sold. The cheap ammo was really one of the selling points.
• Unlike the original Russian ammo, the PPU ammo will be Boxer primed and can be reloaded. Reloading may be the only inexpensive way forward.
• About every 4 years some new owner asks the same question. Start with a SEARCH of this forum.