Sorry I have no idea how that combination will work for you.
But I can tell you that I tried out the BA115HP (220W) yeasterday with a Fender J and to
my ears it sounded very sweet, and next week I'll go back and pick up the amp. I only need it for home practice and smallish gigs and jams so it's plenty for me.
So...
if the 300 sounds half as good, you should have no problems.
Maybe not the answer you were looking for , but some kudos from me for these BA combos
Good luck.