I only shoot commercial ammo. I have always planned on getting in to reloading, but just haven't gotten into it, yet. I have tons of brass that I've collected over the years for when I eventually do.
That said, I shoot with many people who pretty much only shoot reloads, mostly in competition. There are some that seemingly always have issues, but they also like to tinker with their guns, so sometimes the gun itself can't be ruled out. Then there are some that seemingly never have issues. Like anything in life, there are varying levels of skill, discipline, patience, etc.