Hmmm ... obviously you have not fired a sniper rifle. Yes it is
possible to hit a playing card out from 600m. The bulleyes in the
practicing target is less than 3 inches wide. From 600m out, one
can hit it with proper training and zeroing. Onced the scope is
zeroed to your rifle we can easier put in 7/10 in the bulls eye.
This was done using SSG69, with the new rifle think it will even be
easier right?!?!
However, it is hard, but not impossible, to put one in during live
firing ... fatigue, stress, heat, wind, lighting and terrain makes
it hard to judge the distance and make fine zeroing.