Shot a lot of deer with that head back in the day. Very accurate and it made some devastating holes in animals. Some had problems with them holding together but I never experienced that. Stopped using them when they became hard to find.
I still use these today. A sporting goods store went out of business here in the 90s and I bought all the heads and replacement cartiridges they had. I am down to my last 6.
I started using them with my Bear Alaskan in 1979. When I first bought them the archery shop owner shot one into a cement block. Pulled it out and head was intact, few bent blades but it held up. That convinced me.
Switched in the mid-80s to Rocky Mountains to get a "bigger hole" but never could get them to fly right so back to the Razorback 5s. Never had any issues. If I recall they also made a Razorback 4 and 3.