The HP22b (Carolina Reaper) was a Hybrid and it is now an established strain. With Peppers they are normally crossed a minimum of seven (7) times to stabilize the strain. I started growing The HP22B C.R. When Ed Currie release them back in mid 2012
I got 50 seeds from him and grew many plants, I personally don't think Ed was finished with the 7 crosses, but there was a lot of $ to be made with a new Guinness World record holder, so he release them. I got several plants that were producing a long Pepper similar to the, Bhut Jolokia and the Naga Morich and the rest produced HP22B/Carolina Reapers similar to the Primos, which I think is the Daddy of the HP22B CR. I normally grow 50+ different Peppers, in 2014 I grew 250 plants and the C.Reapers were grown on one of my properties to keep them away from the others. Peter Merle from Semillas is currently working with the bastards of the Carolina Reapers to stabilized a new strain from the throw backs. At the moment I don't think I know of any Chile head that is growing isolated Chiles.
Carlos O