My BLX eat out the wheel hub of the default Arrma rims. I have those aluminum hexes as a default.
It was with 3S on tarmac. Insane power!
But indeed as Woody says make sure your wheel nuts are tight enough!
The difference between plastic and metal wheel hexes is they last longer concerning the steel pin. This pin is the method to give your drive train power to the wheels.
The wheels are also made of plastic, so with hard metal hexes the chances of eating them out is even a bit bigger!