RE: Need Caliber for 15 year old daughter
Another excellent caliber to consider is the 6.5x55 Swedish. Ruger, Winchester and CZ all make fine hunting rifles in this caliber. I am taking my CZ550 6.5 Swede on a doe hunt in a couple of days.
The 6.5x55 shoots a reasonably heavy bullet, 140 or even 160 grains, at modest velocities, ~2400-2500fps. Lighter bullets are available for handloaders. The 140 grain recoil is even milder than my 100 grain .243 loads, although this may be due to the weight of the rifles I fire these two calibers in. The long, skinny 6.5mm bullet offers outstanding accuracy and penetration.
The only downside is that ammunition may not be as common as some of the other calibers mentioned. I handload so I have lots of flexibility, but again, Remington, Winchester and Federal all offer a decent 140 grain factory load.