Has there ever been any GOOD 30-30's?
Yes indeed. The 30-30 was considered a state of the art, high powered, flat shooting cartridge when it was introduced. For those of us who use it and shoot it, we realize that compared to modern ear splitten louden boomers it has its place in target shooting and in hunting.
I have hunted both deer, bear, and moose with a 30-30. In over 40 years I have only lost one animal due to poor bullet placement. I can not remember an animal that needed a second shot to dispatch.
Bottom line, the 30-30 is over a hundred years old. It is limited by the guns that were built for it a hundred years ago, and by case capacity. That being said, in a modern gun, with modern ammo a person who can shoot it well and practices with it will have no problems bringing home game.
I seldom shoot my 30-30 with jacketed bullets any more. I use cast 180 grain Loverin bullets. Velocity is seldom over 1700 fps yet game animals like Mule deer fall with one shot and do not get up.
My 30-30, my 308, and my 30/06 all shoot the same cast bullet very accurately up to 1700 fps and a game animal can NOT tell the cartridge that bullet came from when it goes through their vitals.