Meanwhile a near perfect cartridge had been around for decades
The good old 6.5x55 that everybody started loving and thinking was the best thing ever once they shortened it by a tiny bit and called it Creedmore.
The 1940s "Prickstyle" bullets for the 6.5x55 even look very close to "cool modern" bullets everyone is using.
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To this day it's still going to outperform your cool Creedmore stuff if you load it with the latest projectiles and velocities.
But I guess you know having to move your bolt 1/4th of an inch more is really super hard...