I know they work well on big pigs, smash right thru heavy shoulder bone and track straight thru. I believe unusually high costs of mfg process in this design contributed to them being discontinued, hopefully someone in the know will chime in.
I have several boxes some labeled as Black Talon others as Fail Safe, looks like the same stuff to me just different logo.
I wouldn't say they're a big deal today amongst what else is available in 2021 in .338 dia but definitely a solid performer/consistent IMO in the instances I've used them.
Yes I know, old thread I just ran across.