12's are weak and you probably won't even make it to season without having to buy more.I tried them for 3-d and they lasted about 1 month and I was down to 5 so I moved on.

Plus when the wall is that thin,there is alot of wobbling that goes on in the arrow when it hits something,that isn't even considering what happens on a bone hit.

That isn't to say they couldn't get the job done but there are much better choices,in the same spine range,if you want light,stay with the carbons.