I went and looked at your pepper. They look similar to “ghost” peppers. Those have become my go-to pepper for my hot sauces.
Ghost peppers are longer and don't have the stinger on the end. The bumpy flesh is more gnarly on the Reaper also. I grew Ghosts for years and still have about a pound of powder. I am growing a Spanish pepper called a Naga but the plant hasn't fruited yet so I'm not sure if it's a Ghost or not.