knifetester said:
...I would ask for a full flat grind ground to about .035 behind the edge. If you will be sticking to light vegetation you can go down to .025" behind the edge, but you will be cutting the scope of work the knife is capable of. Look for an edge grind of around 20 degrees per side (or 15 degrees with a 20 degree micro bevel for somewhat lighter work).
That is very solid advice as usual. At about 0.035" with a solid steel, I have been unable to induce rippling even on bad knots, at about 0.025" you can handle all manner of wood work out side of heavy batoning inducing lateral strain from ring knots. As you dip under 0.025" then even chopping can cause the edge to ripple if you hit poorly.
I have dipped down to 0.010" on occasion just to see how my skills run, and I can't get that thickness to hold except on the softest woods when I am really careful. If I mess up just a litle bit, or the wood changes consistency suddently the edge just blows. You don't have much margin for error there, they cut well though.
So 0.035" is a solid starting point, if you are really skilled or your physical abilities lower than average, or you just won't use it aggressively, you can go much thinner and you can experiment with this after awhile by simply thinning the edge with a back bevel. On the other hand though, if you go too thin and the edge ripples you can't fix it as readily.
As for edge, 15 degrees holds up to any wood work with a 20 degree micro bevel just from honing on a Sharpmaker as needed. The user just runs the micro bevel, the maker just creates the primary. Of course it doesn't need to be exactly 15 on the button, just get it a few degrees under 20 so you can hit it on a Sharpmaker or jig easily.
If you hand hone this doesn't matter as much and instead you may want to look at a convex edge which sweeps out from 10 -> 20 degrees from the shoulder to the edge of the bevel. This is easy to create with a belt sander on Justin end and easy to maintain on your end with several methods.
As for Swamp Rat, I don't think it is a newbie question to ask for a comparison, the RD series are in fact ground from Busse blanks so there is obviously a great deal of similarity between a DR7 and Camp Tramp, aside from the handles which are fairly different. A lot will come from the type of RD (hollow / flat) and the respective edge geometries.
-Cliff