Buddy, if you can do that with a peep at 50 yards: 1. You have a good rifle 2. You're a good shot. 3. You have good eyes.
I couldn't do that with a laser beam off sand bags. Friggin eyes are the pits.
It takes a lot of concentration.
https://www.24hourcampfire.com/ubbt.../13581995/marlin-336-and-groups#comments There are pics of the rifle and 50 yard sighting in groups. Love that rifle.