243 is just a necked down 30'06 - so I would say the 308 - just speaking chambers. The game you are shooting does not need this type of round. I would look at a 222 or 223 - or even a 410 that you could also shoot a 25 slug and deer hunt if you want. Both the 243 and 308 are also great deer rounds. Reloading both will save alot of $$ if you like to knock off a few boxeson a Saturday.
Looks like you are best off buying 1 of each - just to be sure and have what you need.
