I'v taken deer with the f-3's, two deer. I got both deer but both heads lost blades. I hessitate to say they suck because the deer died quick & they flew GREAT so they did theyre job its just I'm not used to losing blades on perfect broadsides. Only other blades I ever lost was once on a spine hit with a Tekan expandable.
I also used a Cabelas "mini lazer" I think they called it. Its a full sized 3 blade broadhead. That one stayed together.
So, yeah, they work but they aint top notch IMHO.