Please educate yourself and stop misinforming readers of this forum. Frangible bullets are designed to break up into small pieces when impacting hardened steel targets. Against soft targets like terrorists or building walls, they act just like full metal jacket bullets.
Any bullet designed to terminate a lethal threat, will easily pass through walls, aircraft hulls, etc. Use what the FBI and Secret Service uses. Hint: Gold Dot.
I have fired loads of frangibles and they do a fine job of disintegrating on more than metal or stone.
Wood, fibreglass, windshield glass, sometimes drywall.
Your mileage may have varied.