Great story. Glad it all worked out well.
I agree that if I were "hunting" bear with a handgun the .44mag or bigger would be among my first chioces. But I rifle hunt, & call Elk for my bow huntin buddies, so my sidearm is much smaller.
I have a Passion for Bear hunting, & have anchored my share. (tho not from 10 yds on a charge). I've had bears at 6 feet, & they were so lightening quick it scared me. I've killed bear from 27 yds on out to a few hundred yards. I Always have a side arm, but mine is in .40 S&W, & ya it goes right thru a bear skull at close range with Win PDX1 bonded hollowpoints, REM Golden Sabre hollow points, & American Eagle FMJ. It's a proven performer for me, but id much prefer a bigger gun in a full on charge. That must've been one Incredible experience as a hunter facing the charge, as well as for the father watching his son!!
My hat is off to you both. Your raising him right, & it looks like he's gonna be a contender in years to come. Definitely has "sand", & at times that's what it takes. I can only hope my sons turn out the same. Either way hindsight for both of you would be quite an experience, & a great father, son bonding memory.
You must be one proud dad.
(& ya, with that much sand he'd be a good choice in any kind of fight).