I do often times shoot aluminum during our winter 3D league (outdoors). Those 2212's pull loads easier than most carbon out of McKenzies.
And right there is one of the very bestest reasons for shooting aluminum!! Especially if you've got a bad back. I have hurt myself, on several different ocassions, wrestling with McKenzie targets trying to pull carbon arrows. And you don't even have to rub magical ointments and unguents on aluminums before shooting them to get 'em to come out.