NO! It isn't proper. I shot last Sunday with a friend of mine, his wife was also along for the shoot. From target 1 she was asking yardages of her hubby and before target 5 she just started using the range finder. He wasn't using it, but when she shot before he did I saw him looking at her sight for yardage. I've never been around anyone who's ever ranged anything before the group was done shooting the target.