I've never heard of the failsafe bullets before. What's the story with them?
back in the early to mid 90's Winchester came out with this bullet to compete with the partition, barnes X and the A-Frame. It was a hollow point that had a steel core in the middle of it, when the bullet hit it would peel back like a star(much like a barnes) until it hit that core. black lubalox coating in a nickel case....looked bad arse. they promoted the hell outta it and we all went out and bought them.
only problem was unless you hit bone they would not expand on deer size game. they gave similar performance to barnes in where they zipped in and out on light skinned game not really doing much damage, made for some long blood trails on mortally wounded game. extremely deep penetrating though.
they got phased out in the early 2000's being replaced by the partition gold and some other bullet that I cannot remember what it called. we all went back to shooting soft points and ballistic tips in our deer rifles