Had to be 8 plus years.
My dad bought me a Rem 700 in .222 and a C&H offset 'O' press for my 12 birthday.
When I was little I knew I was a 'big boy' when I got to dispatch the hogs with a .22 (I still have it). My grandmother normally did this as my dad, uncle and grandfather were working the hogs in. So I was shooting hogs (had to be in a certain spot a the rear of the skull or too much 'head meat' would be 'ruint') the fall after I turned 4 in August.
But that was a different world and better in so many ways.