I've not tried the new Hornady bullets yet, probably won't. Why? Well... I think they're some marginal improvement, but mostly hype to make some $. I note that Hornady's comparison figures have snookered many - they zero their new load at 200 yards, then compare its 300 yards drop to a 150RN... zeroed at only 100. C'mon, that's just plain deceptive. If you need to do that to sell your bullets... hmmm...
I think the new bullet will give improvement on shots that are marginal with a 30-30 - that is, 200plus - but they've STILL long shots with a 30-30. I think that for the vast majority of guys using the 30-30s the way most do, the new bullets are all hype and will make no diff. It sure won't turn the 30-30 into a .30-06 or .270