I look at the target given with my P99 but there's nothing on it about the kind of ammo used.
I think it's probably RWS Geco 124 gr FMJ because it's the standard german load but I may be wrong...
Don't know where you heard that, because everything I've read indicates that the preferred round the P99 was designed around was the 124gr FMJ and RWS/Geco was the round featured in all of the early P99 photos and brochures (and in the Walther Book).
I believe the US Importer, Smith & Wesson, actually fire the case here in the USA after they have imported them, to meet the requirements of Mass. and other fascist states. I don't believe that is the ammo that is used at the factory in Germany to produce the test target.
This is the only place that has it consistently. Other good stuff I have found is Fiocchi 123gr FMJ TC. Very consistent, a little hot, and very accurate, though I don't think as accurate as Geco. It's at Cheaper than Dirt and only 110/1000!
Anyone know if the recoil spring/guide rod is different on the US model? I seem to remember reading something about the US one coming with a spring better suited to 115gr bullets as this is what is more commonly shot in the US.
If it IS true.....anyone know where to get a Euro spring and rod besides Earl?