I gave up on the 2.5 Thompson Electra-Dot and mounted a 4 Power
Bushnell Centurion on the 357 Magnum.
I was sighting it in when my grandson came up. It was hitting good on the paper at short range so I moved it out to 50 yards.
After shooting three to see how it would group, my grandson who just turned 14 shot three and it was obvious from the results that a good part of the issues I've been having are shooter related as his results were better than mine.
Nice to have him show interest in shooting and hunting.