That has always been my practice. A big day on the range might be 10 rounds in a tight group at 100 yards to be certain the scope or irons are properly zeroed.
Good for you. Apparently others adopted your strategy as well.. We have steel targets at 100 and 200 yds that go gong went hit. I get a kick out of ringing the bell. Gong. Gong. Gong. Not nearly as precise as you though.