Hints that the SMK's performance can't be relied upon along with the suggestions for the use of traditional hunting bullets is good advice.
I would go Scenar before SMK, but for your hunt, no question it would be the 210 TSX.
If it's black bear you're after, a 7mm and X is plenty.
The 300SMK has long been the goto .338 bullet for lrh. It doesn't take very long on this forum to see that.
Scenar's, after over 7 years on this forum and having seen testing and reports here about them, have not been the chosen bullet as they tend to not expand. The 300SMK, of all the SMKs, enjoys a pretty good reputation overall here for lrh purposes. I've seen numerous pictures on this forum over the years of perfectly expanded 300SMK's. AND, there's more than one way for a bullet to act and still kill very well. Look at the pics of Berger Hunting bullets (oh my, another match bullet) in a recent post by Eric Stecker to see how Berger bullets are working--much different than the typical hunting bullet. And, they enjoy a pretty good reputation overall. No bullet works well in all situations. We have to know the bullet and what it's appropriate for. In short we have to 'know our limitations' and that of our gear. Ourselves and our gear all have severe limitations and compromises. Bullets in particular.
A 300g, .338 bullet will has so much inertia and will do so much damage, that the type of concerns one might have with the terminal performance of a smaller bullet may not apply to the same degree as the .338. I've followed the performance of the 300 SMK for years on this forum and finally decided to have a .338 Lapua Imp. built for use with the 300SMK and 300 Berger. Berger Ballistician Bryan Litz, more or less told me, not quite word for word, but close, what I said about the 300g .338 bullets above regarding terminal performance. The 300 SMK is used for hunting big game by a great number of folks on this board, some of those are the most well known with long proven track records on this board. This hunting with SMKs discussion is like beating a dead horse, it's been had so many times.
To be tremendously concerned that the 300SMK may not be suitable for killing black bears, that are typically not very big, much smaller than an elk typically, especially at long range, is absurd.