I don’t understand how you can say it’s a 3 from 1 pellet when you had to take the third one out with another pellet. Shouldn’t this be a 2 from 1 shot. Just asking because I don’t get it.
If you want to get technical using a steel tape and measure from the front edge of your shooting table. Otherwise using your range finder works just fine.
A bath towel folded a couple of times then use duct tape to hold in place. Two towels if you need something to hold the butt. Or you can buy an inexpensive rest on Amazon.
You’re the problem police act the way they do. Why not just comply and get it over with. Why play the lawyer? They’ll just scrutinize you more closely. Nope, your way of thinking will only bring you more trouble.