My brother is looking for a rifle that will fit my niece very well. He wants a gun that's light in nature, shoots flat and hits hard. He was looking at the .243 but would like to go with something just a little more beefy. He's also looked at the 7mm-.08 but hasn't really found anything he wants to buy for her. What gun would you go with, or is there something else we should look at? I would probably reload shells for him so bullet availability is not an issue.