I bet a lot more states will start doing that. In VA they only recently made it illegal to shoot deer with less than .243. And even that has to well-placed on a big deer, or you're gonna have to go find it. Someone mentioned 25-06 earlier, I think if you don't shoot anything bigger than deer, and can only have one gun, that might be it. 270 is too big for varmint IMO.
Gut-shots with 300WinMag are not going to be recovered the same day.
Coyotes shot with a .17HMR are not likely to be clean kills and I owe the animal better than that.
In re Howa 1500 with 1/12, you are severly limited to light bullets with that barrel and in wind country, it's going to really drift.
I shoot 77gr MatchKings and they are absolutely dead accurate.
.243Win is the best compromise cartridge.
the 'X51 case is the most efficient, accurate design in standard production.