I now have the desire to get an 18" Kobra and a heavy-duty, full tang chopper. After having read many reviews about the Bonecutter, M-43, and CAK, can anyone explain the subtle differences between them and which might better at one application than another? I just can't seem to catch on fast enough. Thanks in advance!
The Bonecutter, M43, and some of the top choppers in HI's line up. Throw in the Ganga Ram and you have the Four Horsemen of the Chopocolypse
...well and the WWII
The bone cutter tends to have a bit more subtle curve with a wider belly. Aesthetically, it's one gorgeous chopper and has a real cult following on the boards

The CAK is the quintessential "sharpened chopping pry bar". Personally, I never found it to outchop some of my other khuks, but others swear by them. It's going to be incredibly tough to break one. Unlike the BC, the CAK is a bit more angular with a hard break at the spine. It drives the tip down a bit more when you strike.
The M-43 is the most "weapon-like" khuk of the three. Like the WWII, the M43 straddles the line between tool and weapon incredibly well. IMHO, the WWII is a bit more tool than weapon. The M43 is a bit more weapon than tool....but the wood you chop isn't going care one way or another

The full curved arch of the M43 really drives the blade home point first. It chops way better than it has any reason to
Word to the wise, be extra careful when you transition from a straighter khuk like the CAK to an M43. If it's a really curvy model, then a glancing blow can send the tip back toward your shin or thigh PDQ

The M43 is a whole different animal than the "working" khuks. In my experience, mine has been much more bloodthirsty

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