At ten meters, about 11 yards, you missed by 0.5 inches. So at 143 yards you should miss by 6 or 7 inches. I think this sounds respectable for someone with your training. By the way, I have no training. I suspect you would have been even better if you ever had Marine training. As it is, I suspect you would not have passed the minimum requirements to become a Marine even when you were 19 years old, no disgrace for one without Marine training.
By the way, I understand that for experts, at least up to 300 yards, they can expect that they might miss by up to an inch for every 100 yards of range, so at 140 yards they might miss by 1.4 inches. Above 300 yards the error may start to increase more rapidly, due to misestimating the range or the effects of the wind.
At ten meters, about 11 yards, you missed by 0.5 inches. So at 143 yards you should miss by 6 or 7 inches.Apparently you do not grasp the results shown on the sheet of targets. I didn’t miss at all. All ninety shots are accurate enough to hit within the minutes of angle (MOA) involved in the Trump shooting.
A Minute of Angle (MOA) is an angular measurement.
A MOA is 1/60th of a degree.
1 MOA spreads about 1″ per 100 yards. (actually 1.047″) Therefore at 143-yards one MOA would be approximately (1.047” x 1.43) = 1.497”.
An average human head measures 6-7 inches in width and 8-9 inches in length. Let’s use the smaller dimension as a diameter say, 6.5”. Therefore an average human head at 143-yards equals 6.5”/ 1.497 = 4.3 MOA
So, at 11-yards a MOA is: 1.047” / (100/11) = .115”. Multiply that by 4.3 = .645”. So, .645” would be the equivalent target size at 11-yards.
The largest group of ten shots on that sheet of targets is 0.303” center to center. That is less than half the 0.645” equivalent target size. In other words, I could have missed the point of aim by a significant margin and still hit within the target.