I have a .243 and ever since I bought my 1:12 Tikka .223 I've never used the .243 since.. I've shot mountains of foxes with it , very flat shooting, low recoil, quiet and deadly accurate. You definitely don't need anymore for foxes..Drop them easy out to 350yds. With home loaded 40gr vmax its neigh on identical trajectory to a .204 and everything is very easy to purchase for the calibre. Some like .22-250's but if I wanted a load of noise, I'd just use my .243 with 58gr vmax, its better all round than a .22-250 and deer legal.