I too am curious why you prefer the duty to the defense.
The duty ammo is specifically designed for excessive penetration for LE. You aren't going to be shooting through car doors or barricades.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."