9mm RN vs Trucated Cone FMJ? Does it matter AT ALL?

The only difference I have ever noticed between the two is in the feed cycle. The RN's seem to feed easier than the TC's in my 9mm guns. I have used both but only noticed a feed problem a couple of times. You might want to order, or go out and buy just a few before ordering a bunch.

TC is more accurate than RN, if your firearm is capable.

Since getting a .357 sig that requires truncated cone bullets I've been loading them for my 9mm also. They have worked in my Ruger P89 and SR9C.

Only difference for reloading is having to set the overall cartridge length shorter than for round nose. For round nose my minimun length was 1.20" and my TC is 1.09". Those numbers are for 115 gr plated by the way! I think I got everything I meant to say in here.