Hi folks,  what is the proper way to single load the AR15?

From a magazine with one round in it.
If you are talking competition, there are one round blocks on the market that fit in the mag well.

It's pretty simple to place a round into the chamber - if you have an empty mag in place, all you have to do is drop in on top of the mag, tilt the rifle down, and it will slide into the chamber.  Once it's started, hit the bolt release and you're set.  

I think you could just put it on top of the empty mag and hit the bolt release, but I always like to start it into the chamber by tilting the rifle first.  Never saw much need for one of those single-round followers, but a lot of folks have them.

Just start the round in the chamber and hit the bolt release.

I also see no need for a SLED adaptor for an AR.

I had always figured if you drop the round into the chamber and then let the bolt loose you’d get a slam fire.

I shot my first service rifle match this last weekend and that is all everybody does, and no slam fires.

So if I’m all strapped into sling and weapon is pointed downrange I’ll do it the way "they" recommend it. any other time I’m using a magazine.

J

My nitpick for the night:
Starting a round as described above is (supposedly) bad for the extractor.
It causes the extractor to overextend by making it "bounce" over the rim of the cartrige.
When a round is fed from a magazine, it actually slides into the extractor from the bottom, and does not pop the extractor over the rim.