Thanks Louis and kuduae. I now understand.
When the 9.3x62 first came out, according to John Taylor, the 286gr. bullets, both soft and solid were running 2,175fps from test rifles.

In about 1925 or so, the velocity was increased to 2,340fps or thereabouts, again, from test barrels.
Taylor noted, this higher velocity was not needed.

I thought perhaps this loading is what MS was thinking about.
Thanks for answering my query.

My 1929 Husqvarna 9.3x57 actually made 2,170fps from it's 23.4" bl. using 45.0gr. H4895 and 300gr. RN's resized from .375" Hornady bullets. This loading should do as well as Taylor's "early" 9.3x62 ammo.