Dang I could write a few books in this category..... I have a lot of experience with astral projecting (not even by choice)...and astral plane travel (by choice).
First I'll define these two terms from my viewpoint.
Astral projection is simply separating the astral body from the physical and moving from point A to Point B, sometimes via intention, othertimes .....just however it works out.
There is very little purpose in this for the New Seers, in fact I'd say it is very counter productive.
Note the Name, "ASTRAL projection".
What is the astral body? well "Astral" denotes Desire/Duality, some seers call the astral plane, the plane of desire.... which is quite accurate.
Duality is cultivated to it's end point with the old seers, so for them this process could have benefits....but for the new seers it will only magnetize them more to their description....which it is their task to transcend.
So once again the student needs to determine if they are a new or old seer.
Now astral plane travel is different.
The astral plane is the realm we pass through when we die.
This is an intense place with very powerful attributes...... and dangers.
This is where the Double lives, this is where the "Heaven and Hell Realms" are.
This is where the yoga of the death state takes place.....
But should not be traveled without a Teacher,
it is after all the plane of desire, so we can be easily distracted there.
Gazing at our own Double there can halt our evolution,
just momentarily focusing on any of the realms there can pull us in to an "eternity" in one of these places (though luckily a blink of an eye in our time, if we can extricate ourselves from it....which is very difficult....)
So, for us that are the New Seers, if we have a teacher that understands that Plane,
we can gain very great benefit by traveling there.
The main rule is not to be distracted and to go...focus attention and intention on the Pure Light beyond the darkness and realms and constructs floating about. This is a difficult task as well if our "island: isn't very clean. As all the clutter on the "island" resonates at certain differing frequencies (that are counter productive to our progress)...and the nature of the realm will draw from the plane that which resonates in a similar frequency...... making cleaning our Island even more difficult as we pile the crap on deeper.
I learned a vast amount by travelling there, by following (sometimes) my teachers instructions....but I learned more by cheating......... however lost many , 30 plus years of my evolution by doing so.
At one point in time I was out of my body more than I was in it. Astral projecting all over the place, watching my wife cook diner, floating down the street...... It sucked, because I was always afraid I couldn't get back into my body...it was a problem..... I finally found someone that told me very thick black doses of Valerian tea would bring me back....it worked like a charm. But it was, after all, my "Cheating" in my astral plane travels that created the problem of being out of my body.....without that intention, for prolonged periods of time.
So, in summation.....
Old style seers might have some use for astral projecting.
To The New Seers, it is counter-productive.
For the New Seers, one of the fastest and greatest paths to personal power,
is found in the proper use of the astral plane, but again this is a very hazardous path without a Teacher that knows the ropes.
Thanks again for having this forum that allows the discussion of subjects rarely encountered or understood by the majority of humans.