Not garbage. I spoke to some folks at church yesterday. One was a kid who shoots. The other had served as sergeant in an airborne division. They agreed that 140 yards is not a tremendous distance. Sarge said that he had been trained to hit targets at 300 meters, with iron sights. 140 yards is NBD.
I, once about thirty years ago, before witnesses put three shots in one hole at 100 yards from the prone position using an M1-Garand. Peep sights. Best shooting I have ever done. Alas it was the sight in phase and did not count.
I have never been able to do that again.
100 yd should have been an easy shot with an AR-15.
My son was making 200 yard open sight shots with an M1 Garand at 13 years old, from prone unsupported.
You are correct, it’s not a great distance.