I load for my 74yo FIL. It's horrible you have to second guess helping friends out. Seems there are quite a few threads about kabooms with reloads and then there was that YouTube guy, Kentucky ballistic, that famously shot some reloads and almost killed himself while filming.
I will invite certain friends over to use my equipment so that they can load their own ammo. For some good friends I might even borrow their rifles and do some development for them if I know they don't have time.
There is absolutely no way in hell I'm shooting anyone else's reloads. I have zero faith in Billy Bob down the street.