M98 actions ARE stronger than any pre '98 just because they have a thicker front receiver ring. More material = more strenght. The M/98 was also designed to safely handle almost every possible case and action failure.
The metallurgy is also a factor, to a lesser entent in the pre WWI actions, but as you got up in time the metallurgy became always better for the M/98 (less forced labour wartime production, of course), while the M/94/96/38 have kept the same basic material, which would have been considered "soft" by today's standards as it was only surface hardened.
But from another side, the quality and uniformity of steel the Swede used for their Mauser is well beyond what you usually find over 50 years of production.
When compared to the M/98, the M/94/96/38 lack the massive gas escaping ports and third lug features, which is an issue if a case head separation shall occur.
Now, Husqvarna used two variants of their M/38 action to chamber in 9.3X62; the M/38, military style (but brand new actions) for the model 46AN and the so-called "commercial" or "solid wall" action for their model 649. Also, a lot of M/46/46A were re-chambered from 9.3X57 to 9.3X62.
So, if HVA made it available in that chambering, it is likely that the action can take it and I use both original models (46AN and 649) for hunting, and never got an issue.