My experiences with the 243 havent been good..but of course I cant shoot for s**t....this is what they tell me when I say my experiences are bad..lol. Since there is already a sense of doubt in your mind go ahead and bump up to the 260/270/7-08. Those calibers are all made in the cdl also I think with the exception of probably the 260.
IMO and of course Im gonna get blasted for this which I always do but I think the 243 is a little too big to shoot varmints all day and a little too small for a #1 deer gun. Not really sure what its intended use is. Let the bashing begin....but dont worry I wont be responding to any of them
With that being said...if it works for you and you like it...more power to you.