I've been reading the forums a lot recently and it seems that the .243 camp has a lot of members! And when a newbie comes along looking for a Deer rifle, they always ask .243 or .308?
The more I read, the more I wonder why? Yes it will work, but it's hardly perfect. It is just about legal energy wise and when shooting 100gr bullets in Scotland it's right at the limit of it's bullet weight unless you have a fast twist barrel. Quite often people find the accuracy drops off at 100 grains and prefer to go slightly lighter down south where they can.
When you look at it that way, why do so many people support it? Why not use something bigger? .25-06 is fast, flat and throws more weight comfortably although it is a bit harsh. 6.5x55 or .260 are mild rounds which again handle the weight better but don't knock your shoulder for it. Then there's 7x57 or 7-08 which is going a bit on the large side if the gun is to be used for Foxing but is otherwise still good.
I guess I just don't get why people love it so much? What good points does it have that aren't covered by slightly bigger rounds? Trajectory is an issue I suppose, but not in every day Deer stalking. Shots are most often taken at about 100 yards and between that and 200, there ain't much in it no matter what calibre you use.