I also have an affinity for the old cartidges. 7 X 57, 8 X 57, 6.5 X 55, 30/06 and my monicker, 8mm/06 isn't a terribly old wildcat, but was born of necessity when many surplus Mausers came home without a good supply of ammo. A simple ream / re-chambering and the Mauser then shot the same .323 ball from the /06 case.
I also enjoy shooting my older guns ... Moisin Nagant, Swede Model 94, 1928 made Savage 99 takedown in .300 Savage, 1923 produced Winchester Model 06 .22 pump. One of my older Swede's has a Obendorf 1899 date on it.
Nothing wrong with the new cartridges and equipment. Many great improvements. But the older stuff can still get the job done.