Are you talking about bore sighting them or shooting groups? I would not be happy with a 2.5” group at 100 if shooting groups, but also wouldn’t do it at 2x mag
The riflekuhl is tiny, portable, pushes a good amount of air, and just requires you to flip a switch and turn it on. Throw it in your pocket when going hot and doubles as a chamber flag. What’s not to like?
I’m usually in the 40-60 range with my bolt but have gone as high as 120. With my AR’s and .22lr usually somewhere between 1-200 each. 9mm is around that count as well.