We've got an old 78 Remington that has had the same 4x Bushnell on it for 20 years. I cut it down to fit the Missus a long time ago and she's never wanted a better scope. Every year, I fold an envelope into a 3x3 square, staple it onto plain cardboard and fire three shots at it from 200 yards, from a rest. I can see the cross-hairs against the envelope and it gives me a good zero check.
This year I only hit it twice, near the middle, and frayed the edge with the other shot. Guess I am getting old.
“Nine-tenths of tactics are certain, and taught in books: but the irrational tenth is like the kingfisher flashing across the pool, and that is the test of generals. It can only be ensured by instinct, sharpened by thought practicing the stroke so often that at the crisis it is as natural as a reflex.” ~ T. E. Lawrence