marvin welcome
I have reloaded for a quarter century - less these days but concentrating on big stuff rather than trying to churn out loads of 38 and 9mm as I once did.
I do agree ''tailoring'' a home rolled load to a gun is an excellent way to achieve near perfection. However, I think most people regard factory ammo quality these days as pretty good plus - the ever present slight concern (tho not really proven) of perhaps using homeloads in a defensive situation and then being dealt a harsh card in any legal sequele.
Arguably it should not be necessary, with all the factory ammo choices and I do not see enough variation in quality to really concern me. What I am aware of tho is - the incredible difficulty of making small semi's work 100% - as there are so many dynamic problems to overcome.
The R9 as with some other small semi's does push the envelope and at times does seem to give some folks problems - as indeed also do some high end 1911's, in particular the very compact versions.