I like the RNFP FMJ too. The meplat punches a bigger, cleaner hole, while still getting the desired penetration of an FMJ.The problem with most of the ballistics testing you find online is that they use clear ballistics gel, which is not the same as the 10% calibrated gel that the FBI uses. When I found this site that does all of their testing with 10% and 20% calibrated gel, it really opened my eyes. The results for .380 JHP were worse than I would have guessed, and I'm going back to flat point FMJ, either SIG Elite or WWB.
380 ACP Ammo Selection
I still alternate +P Hydrashocks with the RNFPs though, because I feel like it is the way to get the best of both worlds - as long as a double-tap is what you practice and plan for.
JMO, and YMMV and all that...