I bought an Impact for my 9yr old for his first hunt last year. He took a big doe with it at 30 yards (50 yards is his limit) using 60gr of BH209 powder with a Barnes 250 gr TMZ bullet. It was a complete pass through, that load has plenty of knock down power for the range he is allowed to shoot. When shooting this combo, for me, it feels like shooting my .243, mild recoil.
Don't worry about buying the Impact, you made a good purchase. Being able to remove a section of the stock for smaller framed shooters is a nice feature along with the rifles lighter weight.