the 300 RUM pretty much outclasses & eliminates all the other cartridges mentioned, in fact it makes them obsolete in terms of energy comparison on target at long range
you can always download to match velocity of the slower cartridges, which in turn opens the doors to a multitude of other powders in this world of "crisis shortages" and will enhance brass life, effectively eliminating the terror of barrel life some seem to dwell on but will never see in a hunting rifle
the 300 RUM run hard and fast also mimics the bigger 30-378 Wby and is right on the heels of the 7.82 Warbird, there is nothing it can't do that other factory produced 30 cals do
The 300 RUM stomps on & can duplicate velocities of many 30 cal cartridges, pretty much build one custom dream rifle in 300 RUM and have all these as well ......
300 Norma Mag
300 WBY
30 Nosler
300 Win Mag
300 PRC
300 WSM
300 H&H
30-06
308 Win
+ all wildcats off of these in 30 cal & nothing in 7mm or 6.5mm is even remotely comparable in terms of effective killing power
there you go gents, science also supports this presentation, right in line with common sense .. hahaha
P.S.
the only way to make the 300 RUM better is to neck it up to 338 cal ....
like Jim Shockey would say, " No guff"