I have the Nosler reloading manual 7th ed.
I load for the AR-15 also, Nowhere in that manual does it state "Crimp" this bullet. Unless you have a full auto M-16 don't.
By crimping this bullet in this instance you will deflect metal because it has no indentation area on this bullet.
Overkill for this application in my Opinion. It also increases pressure!
"Our houses are protected by the good Lord and a gun
And you might meet 'em both if you show up here not welcome son"