Originally Posted by gringogigante
I trolled the archives for info and found none. I found one recent Q&A with Mas Ayoob where he referred them as "coming up short on penetration... by some standards".
What say you, amigos?
A gun dealer buddy of mine says they are the crap for SD ammo and even carries frangible OO buck in his HD shotgun. Back in the day, I was told that frangible was not good for SD as it was almost strictly for steel shooting.
What's the new info?
My guess is that "coming up short on penetration" probably relates to the 12" - 18" penetration requirement (after barriers) as set forth in the FBI test protocols. No frangible ammo that I am aware of will meet those requirements.
You could always go to his GATE forum and ask Mas what he meant, too. I bet he'd be happy to clarify.