Hi,
Get an "N" frame S&W .44 mag. revolver, shod in Hogue rubber grips . . . it should wonderfully fit your 1911-lovin' hands. It surely does for me!
Don't worry either if they don't exactly fit . . . that's the least of your worries if a bear decides to chew your face! All you'll need to do is point and shoot at close range. Bullet of choice for me would be a 300 grain, solid lead, flat nose bullet. It should penetrate the toughest areas perfectly!!!
IF YOU INSIST ON USING AN .45ACP . . .
If you go with an auto, any 1911 will do, but PLEASE ADD the old-fashioned, WWI lanyard loop on the bottom of the mainstring housing and attach a loop of sturdy cord to the bottom of the lanyard loop and attach the other end of a short lanyard rope around your wrist.
Doing so will possibly allow you to get your .45ACP into your shooting hand as the bear is chewing your face! Then, you can use the .45ACP to piss the bear off by pointing the .45ACP directly at YOUR brain and pulling the trigger.
A brain shot will thus instantly kill YOU will do two things:
1. Deny the bear of the pleasure of hearing your screams go to no avail.
2. Spare you a LOT of extra pain and suffering and end it quicker for you!
SERIOUSLY DUDE . . . you evidently haven't done much, if any hunting. Game don't always just fall down like the bad guys do in Hollywood, nor does game always fall instantly, like on the hunting shows on TV.
Frankly, I wouldn't try to take a peaceful bear, not bothering anyone, with a .45ACP round . . . for that bear will naturally attack the attacker, and that bear will kill you before he bleeds out himself.
Sure, you COULD make a perfect shot . . . but it is hard enough to do this on a motionless, broadside target 10 yards away that is unaware you are there. Making a perfect shot on an 800 lb. mass of seething fury as he rapidly shakes his head back and forth to aid in him ripping your arm off is virtually impossible.
Even the "mighty" .44 mag. offers no guarantees that you'll win that confrontation alive and unharmed before the bear bleeds out.
T.