New....phhht! Modern and "improved"...harumph! Marketing makes up all kinds of supposed "advantages".
Gotta be one of the "new" cartridges for accuracy! Slop-ey gradual shoulders, belts and rims wreck accuracy, doncha know!
https://benchrest.com/forum/threads/why-i-shoot-the-30-30-in-benchrest.95849/
And zero taper cases, with razor sharp shoulders are a must, otherwise you're throwing out cases! Thousands for new rifle + piles for new trendy brass.. and the whole time there's guys getting 30 reloads out of regular 30-06 brass!