My mother. She was the oldest in a Depression farm family and could really shoot! She could outshoot all of my friend's fathers. To her, one round meant one rabbit or one squirrel on the table.
I was about 7. I started with a cheap bolt action single shot .22, and when I was 12 bought my own Marlin 39A with money made from trapping. I started my son when he was around 6. We still shoot Marlin lever actions, but given their value, we hunt with Ruger 77/22 All Weathers now and save the Marlins for nice days at the range.