Thanks for the replies...Here's where I'm going with this...many times, I wished my Beretta 84FS, Browning BDA380 and Bersa M95 were 9mm guns. To me they are the perfect size for a metal framed 9mm...but...nooooo...they are 380's. So, if I shoot 115 JHP's in a 9mm of any type, metal, polymer, big, small, etc, why not in my big 380's. Of course, the 380 round is low pressure as compared to a 9mm round and therefore much less velocity, muzzle energy and stopping power. I know that. I was hopeful that someone had chronographed a 115 out of a 380, that would tell me plenty about it's terminal performance.
Anyhow, I went to my range and blasted several rounds of 115 JHP's from my Beretta, Browning and Bersa plus I also fired several rounds of typical 90-100 grain 380's with mostly BE86, HS6 and HP38. The felt recoil of the 115's with Bullseye and HS6 was significant as compared to the much milder 90-100 grain rounds. I'm not using felt recoil as a quantitative measure of energy but it sure seemed like they had a lot more energy going downrange. How would the 115's expand in a jell test? I have no idea.
My 380 carry gun is a P238 but I seldom actually carry it. I prefer a 9mm as a minimum (Shield 9, Kahr PM9, CZ75Compact or full size CZ75BD, Ruger SR9C, Ruger 9E), in 40S&W it's the Shield 40, Springfield XD Mod 2 Subcompact, Ruger SR40C, SR40 and of course I can't leave out the 45ACP: Ruger SR45, XD Mod 2, 45 Subcompact, Kahr CW45, Taurus PT945 and PT145 Mil Pro (hand cannon), Shield 45, M&P 45C.
Bottom line: I think I'll forgo the idea of using a 115 JHP out of my 380's and concentrate on finding a metal frame 9mm that is similar in size to the 84FS, BDA380 and M95. Right now that gun is looking like a S&W 6906, gen 4 semiauto.