reading these responses made me think about my hunting experiences. I have not shot any big game with a factory load since 1970, nor any small game with factory shot shell since 1977. How time flys. And just to reinforce, I have never had a misfire or any other issue with these hunting loads.
So far as outfitters requiring "factory", I recall someone going to Africa, where his outfitter made such a requirement. He reported that he simply boxed his hand loads in a nice plastic box and printed labels that said something like "Custom Manufactured for _____ by _____ Custom Ammo.