I remember using 1 of those while hunting groundhogs with my great uncle in the late 60s. It was heavy, very long (wide), and incredibly accurate. I believe it was a Swiss model if not mistaken. My great uncle used an .220 Swift exclusively and had his drop chart/meter to yard conversion and wind chart taped on the old homemade quick disassemble bench he'd made. He, and I (to much lesser degree naturally), made some VERY long shots on groundhogs. Back then we didn't have coyotes in the southeast. Of course I realize it's not the same model but responded merely to reminisce, and because they work exactly the same way.