Of the three I still have a CGFBM and a FFBM. I like the CGFBM the best for all around work. ...
I notice Noss kept his CG FBM also, along with the NMFBM—only sold the FFBM.
This takes me back to when I first tried a SHBM and a Basic 9 side-by-side. I found the Basic could do anything the BM could do and do it more comfortably with its Res-C handles. I later got a BM-E, but found the balance even lighter in the blade than the SHBM, and it didn’t chop as well for me personally as the B9. Then I got a CG FBM and liked the handle design for comfort better than the other BM’s, but it still didn’t make a better chopper for me than the B9—of course, I realize everyone has his own chopping style, grip preferences, etc. The FFBM was the first knife that had enough forward weight in the blade to make a significant difference to me over the B9 in chopping power, and the NMFBM was an even more refined heavy chopper than the FFBM, with its comparable weight, longer blade for more momentum and thinner blade for deeper bites.
I say “heavy chopper” because, as was pointed out recently in another thread, these heavy blades can’t begin to keep up with a machete on light brush. Even a B9 can’t match a machete with speed cuts on light brush under ½” diameter. The faster, thinner machete blade will take out free-standing light stuff with a speed cut, but the thicker B9 will just push that stuff out of the way or dent it back—not enough resistance to stand up to penetration by the thicker blade. By the same token, as you get into the heavier blades like the FFBM and NMFBM, you gain great utility on larger and larger diameter limbs/trunks, but you give up efficiency on the small end. A B9 will out-chop an NMFBM or FFBM on stuff under 3” if you’re doing quite a bit of work, because you can still take out a 3” sapling or take off a 2-3” limb with the B9 in a couple of strokes. Even though the heavier blades will do one or two small limbs quicker, if you use these heavy blades for an extended period they will wear you out a lot more than the B9. Cobalt has mentioned this about collecting firewood, saying the SHBM is his favorite because anything bigger isn’t as energy-efficient. I agree in principle, but feel the B9 is even a little more efficient than the SHBM—just personal preference.
The thing I find interesting about the Bushwhacker Mistress is that it has a thinner blade than either the SHBM or the B9, @ 3/16”, but obviously the blade is also fairly broad (wide)—wider than a B9 and I think wider than a SHBM. I’m wondering if it will end up offering a significant weight or balance advantage over the SHBM or the B9 for this reason, or if it will end up being basically another member of the same class.
As so many others have said, I’d still like to see the Bushwhacker idea carried into a little longer blade, in the 12-14” range, with a thickness down around .15” or so. Until this happens, I don’t see a lot in the way of of geometry that hasn’t already been tried in terms of its effect on chopping efficiency. Maybe Jerry has already tested longer, thinner blades and has found some reason not to produce them—I don’t know. Obviously, customers have been clamoring for them for many years.
A lot of people seem to like their AK’s and Ruck’s as “brush whackers”, so at first blush I don’t see why a wide, thin, longer blade wouldn’t work well, but maybe there are leverage issues that come into play with a wider blade in terms of standing up to lateral loads, etc. that don’t present as problems in these narrower, sword-type blades.