Tim at Braveheart had some KME-ground 25* single bevel years ago, then the mfg started to grind them and I've heard it's barely an edge, a bevel, but barely and edge...
In the "old" days, they came thru as "blanks" with a truly rounded edge!!!
That is one reason I'd go with Bill Dunn's Grizzly as Ron at KME set up a grinder for Bill and they need a bit of touch up, but come out of the pack with a good bevel anyway...
When I shot double bevel, STOS were fairly hard steel, in the same realm as Tusker and Grizzly.
Get em sharp, they stay sharp.