They might work, I don't know as I have no experience with them. However, the Magnus snuffers I know work and work very well. I've found every animal I've shot at within 100 yard since switching to the snuffers 8 years ago. My neighbor now shoots the ss snuffer and I think it is a great head as well. I still prefer the larger cut of the old style, but wouldn't hesitate to use the new SS snuffer.
shot placement is the key. any quality head should do the trick. make sure your arrows are spined for the poundage you shoot. keep the heads sharp. i have seen deadly performance with magnus stingers. they are super sharp and very well made.