They are more accurate.Why HP and not RN?
Well, look at it like this: a person can have lots of fun and learn quite a bit tuning loads (GRIN). Seriously, if it were me, I'd start with something like a couple of different 147gr FMJ RNs and maybe a coated bullet or two just to see, with a coupla-three powders, and start punching paper. Just a personal opinion, but if I had a 9mm that wouldn't reliably feed RN, I'd work on the gun before I worked on loads for it.Target