As a developer, I'm used to using the "rubber duck" technique - step thru the code, explaining the what and the why and such as you go. Works even when explaining to an inanimate object, hence the name. So talking to someone as I load, explaining each step and the how and the why doesn't bother me in the least - to be honest, I spoke to myself out loud while doing it for the first time, and I had the range to myself. I'm also an adjunct instructor, so I'm used to teaching practical skills. So that side of me comes out if someone approaches me at the bench.
If you really want to be annoyed by people approaching at the range, try shooting unmentionables that come with tax stamps and long waits to possess... especially the one with the tripod mount and belt feed.