i've used both i use MUZZYs i've shot a couple deer perfect with mechanicals & i still wonder where they went they are supper accurate but i dont trust them & if u ever miss they are a pain to clean & get to work properly again i tried the nap spitfires i'd stick with those MUZZYS remember they are BAD TO THE BONE
Sounds like we've been hunting with the bow about about same amount of time using basically the same equipment. I started with easton game getters /4 blade 100 gr muzzys and a bear buckmasters bow @ 57#'s==two deer stuck -one recovered. I went to a Diamond Liberty in yr two with a CE maxima 250 /blazer vanes and the rage 2 blade /57#s draw......love it. two for two in year two longest blood trail about 150 yds ....mainly due to the deer having a bedded varmit in his escape route that respooked him after the shot. I recommend making them "Feel The Rage"!
I was a died in the wool cut-on-contact, fixed blade guy until a couple of seasons ago. I went to a slightly faster bow and began to have tuning problems. In despiration I tried the Rocky Mountain Sniper (now manufactured as the Rage). I have become so much more accurate in the field that I will never go back. I have lost a little penetration, but it was a good trade off.
I only use spitfire mechanicals now, I have revovered most deer within 50 yards and last years buck went about 10 feet, it had no idea it was hit.
The reason is that you need to practice with fixed blades and once i got sixteen stitches in my left hand pulling one out of a deer target, before the layer targets were born,No matter though those spit fires fly true and do the job, not willing to take that chance again.
only draw back is extreme angles, can't shoot those with mechanicals but i wouldn't shoot them with fixed blades either.
although i mentioned before how i like the mechanicals.. ive been thinking.. you cant beat the cutting area of a fixed blade compared to the mechanicals.. if you dont get a pass thru, id think that a fixed blade would do more destruction moving around in a deer. i believe it also depends on how sharp ur blades are, it would be tough to sharped a dull mechanical blade, but it seems somewhat simple (although ive never tried) to sharpen a fixed blade..