I like .357 because I can load it for small game to hogs. I have a 105 grain SWC load that moves about 900 fps out of my Rossi that's killer for small game, mimics the uses of a .22. Then, I have a 158 grain load that I've taken deer with. I've still got to get some lil gun powder. Several sources tell me I can mimic .35 remington with this powder in the rifle in .357, talking a 180 grain bullet around 2000 fps or a 158 at near 2200. I ain't gettin' that with 2400, only about 1850 with a 158, but that's enough to 100 yards, really.
Since I cast that 105 and that 158 grain bullet out of range scrap, my loads cost me the price of a primer and powder assuming I've got the brass. But, I have to chase down the brass when plinking. The 158 takes a gas check, 1000 in a box for something like 15 bucks. And, the cost of Lee liquid alox, which goes a long way. I guess the bullet isn't completely free, but nearly so.
If you are informal plinking with a large round like .30-30 or even .357, the barrel is going to get hot and that's not a good thing for barrel erosion. My light .38 rounds are little harder on the bore than .22s are. I love the combination.