I like the way you think! 
I have to agree on all points.
However, I think a lot of us are guilty of trying to save a few bucks on "just practice ammo" and grab the cheap 115 gr stuff.
As we all know 115 gr happens to be the "gold standard' for 9mm- nato. And one would think a semi-hand built $1000 pistol should run the stuff. But then again, think of it as "custom".
I guess I am fortunate that one of mine will eat the stuff up. I haven't tried the other one yet.
9mm NATO is 124gr
9mm NATO vs. 9mm Luger
Posted on April 3, 2009 by Caleb
Now that’s a fun topic right there – as in, what’s the difference between ammo that’s loaded to 9mm NATO pressures and ammo that’s loaded to 9mm Luger pressures? First off, you have to establish that there is a difference, because there are people out there who will fight and argue that NATO spec ammo is exactly the same as commercial 9mm Luger. It’s not, trust me. Aside from the obvious difference in bullet weight (9mm NATO is 124 grain, most commercial plinking 9mm ammo is 115 grain) rounds that are loaded to NATO spec are loaded to a higher pressure than rounds loaded to industry standard.
From Cartridges of the World, 9th Edition page 482:
Cartridge, Caliber 9mm Ball, NATO, M882
Weapon: Pistol, Automatic, Cal 9mm, M9, M11
Velocity: 1251 +/-25 fps at 16 meters
Pressure: 27,000 psi, max. avg.
Cartridge: 179 gr.
Case: 42 gr.
Bullet: 124 gr Copper Alloy
Propellant:
Brand: HPC 26
Type: Double Base Flake
Weight: 5 gr. 6 gr.
Point Ident: Plain Tip