I don't disagree with you but .243 is my weapon of choice for various reasons, not because I can't have anything else I did have access to other calibres but because I chose to use .243
Why, I don't shoot Boar never have doubt very much if I ever will ,not interested in them, there are none in my area and I hope there never will be.
I don't have Sika , have shot a handful and .243 did OK if it was going to be a regular occurrence I might opt for something a bit bigger.
Have shot quite a few woodland Reds and while they are every bit as dead with .243 even a run of thirty yards can make them hard to find in thick cover, so again if I was only shooting big woodland Reds I might opt for a bigger calibre.
Absolutely no problem with .243 for hill Reds.
Long a go I decided that instead of chopping and changing I wanted one rifle that I could use for everything
mostly hill Reds some woodland Reds and Roe also wanted to use same rifle for foxing and it also needed to double as an estate rifle, one that would do the job but not be intimidating for woman or people who had never shot before.
So as an all rounder my choice was .243 and have been using the calibre almost exclusively for all my stalking for the last thirty years.