I love my shoulder holsters:)
I carried a Colt 1911 under one arm, 2 mags under the other, a 38sp on my hip and NAA 22lr in my 5th pocket.
I never used a "H-N" shoulder holster, I used a Bianchi Scorpio and a Galco Miami..., Classic I think it is called.
Both are top of the line, great holsters.
I can have it on, no shirt over, stand side way and you can not see it was on (of course I did not go out without an over shirt, just relating how well they conceal)
Just a T-shirt and a button shirt (unbuttoned) and no one ever saw it.
Go with what you feel comfortable with. Just make sure the snap on the holster is properly closed. :)
Just to add, the Scorpio is no longer made. I recently bought a new Bianchi and Galco. Of the 2, go with the Miami Classic (it is the one with finished leather, not unfinished, suede or whatever it is called)
The Bianchi, years ago, I thought was better, but now Galco seems nicer.
Hope this helps...