I have never heard of that. The paper certainly would make it easier or harder to get an accurate read.Bullet hole diameter on paper is almost always .015-.020 smaller than bullet
My post# 15 was on IBS target. The one with 6 targets on it, what ever it’s actually called. My post was to show what that Ballistics-X program gives you.
Do I shoot targets like this every time? Yeah, in my dreams. But you can add whatever dimension you want to it ( I won’t), it’s still a nice way to get a group size. I have a couple that are a bit better and a whole bunch that are way worse. 21” 30BR. 34.0 4198 Bergers FB I’ve always been a 100 yard guy. Mainly because that’s what most ranges near me have been no matter where I lived.