Re: 24 Caliber Options
I can't really comment on long range but as a general medium or smaller sized deer hunting and varmint rifle the 243 or 6mm is superlative.
Recoil is light, you generaly see the strike on the animal or at least the reaction to the shot. There is a heap of cheap and varied factory ammo (no match though) not to mention bullets.
I have a 24" sporter weight 6mm rem custom that I use out to 300m on our little roe deer with 90gr ballistic tips at 3,200fps. It is superlative. A 6mm rem with 90gr bullets is to all intents and purposes the ballistic equal of the 25-06 with 100gr bullets but with a lot less powder.
I also have a 22" Sako 243 that I shoot factory ammo in at present. Very little difference.
As a general rifle a standard Tikka 243 with a good scope and mounts would be excellent.