I admit, I'm a bit cranky with the 10mm.
The internet fandom of 10mm has ALMOST gotten me to pick up a few guns in 10mm.
After reading up on 10mm performance, to make 10mm any better than 40, you have to reload heavy or spend about double that any of the other auto cartirges (ie, Underwood 10mm is 17 for a box of 20rnds + plus shipping, 9mm HST is about 20 bucks with shipping).
I would bet $10 Federal won't make an HST 10mm, if every, any hotter than 40. This is just what Speer did with their new 10mm Gold Dot: 40 level speed.
Bullet design in HP isn't made for high speeds with the lonely exception of the Hornady XTP where the P stands for penetration. If you want that level of penetration with that expansion...FMJ in a 40 saves you a boat load of money and gives up little. Jacket separation because you hot loaded a round...well, you're giving up the benefits of HP.
So, even those hot 10mm rounds from Underwood, BB, and Double Tap, they might be at the very edge or past the ability of the HP to keep together. None are loading the superior HST round. So, for defense, you give a lot up and gain an older technology.
For hunting, well, even BB states on their website their (and really any) FMJ 9mm is perfectly capable of killing bear. So...