I'll go along with 5-Shot's assessment of the Snuffer heads.......I did kill my first buck with one many years ago with my all wood compound. (Browning X-Cellerator Plus)
......so I have a "Sentimental" spot for them in my tackle box, but I quickly retired them.
I found them, (in my infinite teenage wisdom at the time<img src=icon_smile_wink.gif border=0 align=middle>)for lack of a better word, "Soft".......they bent and squashed and did all kind of funky things.
But as 5-Shot stated, these were the "Old" Snuffers and I understand that they are improved in the Magnus version.
If you insist on trying them, I'd look for this newer version simply based on that company's word that they are better than the old ones.