typical bushing dies- my experience is limited to Redding products, do not resize the body, although I think you can get a die that does resize the body but allows for bushings to adjust the neck tension. Because of this, I can't image that the die for a 243 is any different than the die for a 358 Win or anything in between OTHER THAN the markings on the die.
I use mis-matched dies all the time. I reload for a 300 that is somewhat tight so I use a 375 H&H die to size the body because it is the tightest of all the magnum dies I have. I use a 7-08 die to size down 308 in the first step to 260 Rem.
The bushings will ONLY size part of the neck on MOST cases. You typically can't use them to case form for this reason. For a hunting round where lots of bullet pull is desired, they are not the best way to size your neck as they only get a portion of it.
For my hunting calibers, I have sent brand new full-length sizing dies back to the manufacturer to have them hone the necks to the size best suited for a particular chamber- this way you get total case support and the entire neck size. For BR stuff, this is not necessary.
You can buy the bushing and try it-the same bushings fit all dies whether Wilson, Redding, Forster or whatever. They are .500x.375 with just a difference in the whole and radius.
Typically, carbide is only available in BR sizes, ie; 6mm and some 308. I have tried to buy some in .289, 290 and 291 to no avail.