Agreed, which is why it's dangerous to make solid assertions without some form of reference to other versions.
I wast told by my dad, who was the wisest man in the world when I was a kid, that the 30-30 started out with .307" bullets. When we first started loading for my new Savage 24V, he dug out boxes of .307" bullets! I never looked into it much, but I did run across one of those boxes a few weeks ago while inventorying his stuff. Turned out they shot fine, but the .308" bullets did too and were more common.
"Hornet started out with .223" barrels, because so many of the first ones were re-chambered rim-fire barrels screwed onto center-fire actions..."
I have one of his moulds which casts .228", which he said was for the Savage Hi-Power.
Funny thing on the 303 Savage - I found an old box of 30-30s in a junk box in a gun store when I was a kid and took it to show my dad. He looked and mumbled some unkind words about the "303 Savage" and went back to what he was doing. Huh?? I looked, and sure enough, it was a box of 303 Savage ammo, not 30-30 Winchester or 30 WCF. After that, I never paid the 303 Savage any mind and couldn't say today what diameter bullets it uses without looking it up.
I won't argue any of those points too stubbornly. I'd have to research further and then still, there's usually more than one story. You can't just pick one version and assume that's all there is to it.