Quote Originally Posted by jh9 View Post
Attachment 128611

.380 (red spring on the right) fits the 9mm slide and the action can be hand cycled. It is considerably lighter, though. Hard to say how much without a spring tester.

I'm not sure I would use this for anything other than very sub-minor loads, if at all. It might be interesting to try with that reduced Hornady 100gr critical defense load. Factory says 100gr / 1125fps, and I think .380 averages something like 95gr / 955fps. So similar weight and 175fps difference in velocity. Of course I have no idea how it performs in gel. Even if it cycles the action without damaging the gun it might be pointless.

I still think we'd be better off with an official .380 +P designation and the big 3 loading up to that rather than trying to load the 9mm down.
Thanks.

I was thinking about this in the context of compensated guns. I’ve read in several places (and videos too) regarding the reduced envelope for reliability of the 365 when adding an effective comp such as the PMM. I haven’t had any issues with any defensive loads I have tried. And my training load has been 100% for me as well, so no issues here. However, my 12 year old son consistently has ft ejects with my training loads - indicating that the above data is correct.

Folks spend upwards of $100 on spring kits to deal with this issue. I was thinking the $30-ish rsa from the .380 may be a factory alternative.