I have used frangible at the range for target shooting; against something hard like plate steel, it disintegrates harmlessly into dust.Probably willing to bet it's too "deadly" for us to have either.. I have not had good luck with frangible rounds depending on construction. Also notice the SB193 is 60gr now..
It says the posted date of those is over 2yrs old for the one.
I gave away Sinterfire frangibles that were 5.7x28mm pills to be loaded, about 5 years ago. They used to sell to Civ. Not sure if they still do. Tips were vulnerable to breaking; brittle. I don't reload.Makes me wonder who makes the projectile. At first I thought it was a barnes varmint grenade, but apparently sinister fire makes lower grain frangibles, but sold only to manufacturers.