Interesting to read some of Townsend Whelen's early stories, this from the days when the 30-30 was a newer "wonder" cartridge. He was impressed with it effectiveness on game, period. Also viewed it as very good at "long range" when loaded with the newfangled smokeless powder.
Any of todays bullets are likely improvements over what was available a 100 years ago.
The 30-30 might just be an example where Partitions really are to much bullet, and todays C&C's are just right at such modest velocities.
When I look back over several decades of hunting, mostly with 270's, 35 Whelens, and similar, a pretty significant percentage of that game could have been taken with a 30-30. I should note that I am mostly an eastern woods hunter.


Imagine your grave on a windy winter night. You've been dead for 70 years.
It's been 50 since a visitor last paused at your tombstone.....
Now explain why you're in a pissy mood today.