With zero consumption, this is true. The problem is that with no consumption, it does not matter what the pressure is. The more air you are using, the more pressure drop you will get in the line. There is a limited CFM that will flow through a given orifice. (hose) Through a 150' hose you should be OK for a framing gun, but do not try to tee it off from there or you may start to lose psi.
A nail gun relies more on pressure than volume...that's why several of them can be run off little .5 hp 2 gallon compressors. You could use 1000' of hose and still be fine, in fact you'd probably be better off with more hose because the hose length actually increases your storage volume....thus giving you more reserve air and reducing compressor cycling. All this volume talk only comes into play with high-volume consumers that run continuously when being used, like DA's and ratchets and impact guns etc, etc. I ran 3 roofing nailers off a 100' 3/8" trunk hose that triple-tee'd to feed the three individual 100' hoses which were connected to the guns. The supply was a 5 horse 25 gallon compressor from sears...you know, the one of the ones that can mask a 747 take-off. Had no problem with pressure drop and I would dare say our connections were pretty much just hand tight and not necessarily air-tight......yeah the compressor ran a lot, but I wasn't paying the electric bill either, or maybe I would've tightened the connections better...
