I have not been able to handload and duplicate Buffalo Bore's claims for carbine performance even though my handloads are very close to theirs in 4 and 6" guns. I have not tried Buffalo Bore, but I'm a little skeptical of the claim being it's so far off my own loads out of my 20" Rossi M92 Carbine. I'm only getting something under 1900 fps for a hot 158 grain handload. They could, however, be shooting a lot slower burn powder or something and I ain't saying they're bogus, just that I have my doubts they can get that much more out of a factory load at acceptable pressures when their load performs the same as mine from handguns.
Anyway, I've killed one deer at about 80 yards with my carbine. Don't hunt with it much, just a fun gun I like a lot. It's very versatile with light .38s for small game and heavy loads for large. I think I'd rather shoot a big boar with the .44 mag and a 300 grain load, though. Big hogs can be hard to penetrate the shoulder plate on.
A .30-30 is, of course, superior to both regardless of Buffalo Bore's .357 performance just due to the fact that you can deliver more energy out farther with a better SD bullet, especially if you use Hornady's new Leverloution or whatever it's called load. With that ammo, it's a true 300 yard rifle on deer and 200 yards and in is no sweat. With either revolver caliber, you're lookin' at 100 yards max. For hogs in .30-30, you can also get the Nosler partition 170 grain, I believe in the Federal Premium loads. This is a superior penetrating bullet to the .44 mag IMHO.
Yeah, if you just want a lever gun of western style and the caliber doesn't matter much, go with the .30-30. I wanted my .357 because I also load for revolvers and share ammo. That and I wanted a close range woods gun for east Texas piney woods hunting at the time I got it. It is good for that.
Oh, 4 times? LOL! 25% more is more like it. I get 1520 fps/769 fpe from a 6.5" Blackhawk using my 158 grain cast/gas checked Lee SWC in front of 14.5 grains 2400. I get 1827 fps/1171 fpe out of my Rossi's 20 inch barrel, looked it up in my notes. Let's see, at 4 times, I should be getting 6080 fps out of the rifle? Nah, don't think so. LOL Or, if you're talking energy, well, 3076? GREAT FOR ELEPHANTS!
Well, not quite, but it would outperform a 30-06. Better'n a .45-70 on big bears. These are loads fired over the same chronograph on the same day with the two guns.