The .30 M-1906 (30-06) spec has not changed since 1906 execpt that non chlorate primers are now used as a rule.
I had thought they had changed since 1906, but you were right.
In 1925 they changed to a hotter, heavier loading. A 172 grain M1 bullet with a 9-degree boattail and a gilding-metal jacket. This round had an extreme range of 5900 yards, a gain of 2500 yards over its predecessor.
But in 1940 they changed back to the 1906 loading, when all of the surplus 1906 ammo was all shot up.
So yes, the 1906 load is still Today’s standard.