I started casting my own bullets about 30 years ago after being disappointed with the commercial cast bullet offerings, the one size fits all didn’t really fit my particular firearms. Back in the day lead wheel weights were free for the asking so buying lead is not a issue I’ve have to deal with as I’ve put back enough not to have to worry about bullets probably for as long as I’ll be shooting.
I also powder coat all my own bullets, but I’ve lubed bullet in all the other ways as well over the years. I prefer the coated bullets for most applications mostly handgun and some rifle loads but I’ve also found that some loads shoot more accurately with standard lubed bullets.
I’ve shot many a plated 9 mm bullet as well and found them to be very accurate. If I had to purchase bullets and the difference was only a couple pennies per bullet difference I would just buy the ones that preformed best in my gun.