If the SOG guns have bayonet lugs, they are probably Century builds. Hit or miss type thing, some are great, some are horrible. I'd stick with D-Technik, now known as Czech Small Arms, (gotta love it, CSA), imported through Czechpoint-USA. A new .223 version is here in very small numbers, more coming in soon.
Maverick, I have a few good groups so far, still experimenting, and now loading home cast for this caliber. I haven't tried the cast in the vz-58 yet, a little nervous about leading the gas system, though I hear that my wheelweight air dropped slugs should be hard enough not to lead up.
In this pic, there is one hole in common to the two three shot groups. I doubt I could do that again! And I mis-measured, that's 100 yards, not 120.
When it showed up looking like this,
I tried some Wolf through it at 50 yards rapid fire,
Since that last photographed excercise at 200 yards, I really haven't done much target work, mostly using the CZ 527M...I guess I'd better get her out again before she pouts.