I also quit using mechanicals, after 5 years of using them I come to the conclusion they are not 100% capable of doing their job. Lat year using mech, I had 2 complete pass throughs and recovered, I also had 2 that failed to work, one hit the shoulder and had maybe 2" of penetration, lost that one, next one hit right behind the shoulder and had maybe 6" penetration, lost that one. It is the broadhead, it seems sometimes they crumple like the front end of a car during a collision and absorb all the KE and fail to get penetration. My bow is shooting 280 fps and that should never happen.
I challenge anyone to shoot a target with mech vs fixed and tell me which one gets more penetration. My Muzzy's sometimes blow through my target, my field points and mech will never do that.

I am using Muzzy 4 blade because they seem to fly better than the 3. My friend has been using them for years and seen some wild and poor shots he's made using them, but he always recovered.