P-990 I do extreame long range shooting right now and will be getting into it even more this summer coming up. These are compatition shooters that are telling me this. A 223 is not what you call HIGH POWER shooting either.
Right now i throw my 75 A-Max at 2850 FPS out to 600 and 800 yards.
No disrespect meant,but i think im going to go with the comp shooters answer on this one.