RE: 243 caliber for deer?
My Daughter shot a nice Doe with her single shot .243 Rossi Youth Gun,she used the Remington 100 grain shells and her gun has the Tru-Glo Red Dot scope.I though you could get a longer barreled .243 with the shorter stock?If you Girlfriend can handle a Rifle pretty good I would consider looking for a .243 with a longer barrel......look into the Remington Rifles....if I'm correct the make a very nice Rifle in Camo with the shorter stock for smaller/younger Hunters!
I think the heaviest bullet you can get for a .243 is the 100 grain bullet?I shoot 100 grain Hornady bullets in my Browning .243 Rifle and I have shot several deer with it including 2 nice 8-Point Bucks so far.