I had my sights set on having a 100fpe .177 subsonic. I've been clean and sober for 10 years so it wasn't from an addled brain. I thought that Zan was going to make a 40gr .177, nope even if they did it would be a mighty long slug. So I'll have to be satisfied with supersonic to achieve 100fpe in .177. I have no need for an air gun that powerful, just curiosity. I'll be satisfied with a 100fpe .22 subsonic gun. I've been using Huben K1s for this endevor.