I think it has less to do with your broadhead and more to do with the speed/weight of your arrow as well as the size of your deer and exactly where you hit the shoulder.

There are set ups that will get through certain areas of a deer's shoulder, but for the most part its a crap shoot. There again, you know to avoid the shoulder anyway, so its really a 50/50.

It seems to me that you are really just trying to cancel out as many vairables as possible, which is good. Thats why I shoot Montecs, because the variable of what if it breaks, or is it tough enough is out the window... if anything on the tip of an arrow can get through, a Montec would be a safe bet. Thats just what I do. Not trying to sway you away from anything, because I have no vested interest in either. Just sharing what I have done.