I finally got the time to shoot my little Nano. I was mainly doing a functionality test after reading about the gun being designed to fire the heavier loads; 115 gr and higher. I bought a couple of boxes of both 124 gr Speer Lawman FMJ and 147 gr American Eagle FMJ.
I must tell you, before taking the gun to the range, I polished the chamber and feed ramp, as well as the striker components, and I gave it a thorough cleaning and lubed it with M-Pro 7 LPX. I do this with all my guns.
I was expecting to have issues with the 115 gr loads, but had none!
And then with the 147 gr loads, none either! I did get better accuracy with the 147 gr loads too.
As the gun is designed for heavy loads, I carry a 147 gr HP for defense purposes. And now my two cents. I have looked at other people's guns and have cringed at how they treat them. Most don't know how to properly clean and lube their guns. This is CRITICAL to the gun functioning properly! Take care if your gun and it will take care of you. Clean it after you shoot it. Even if its only a few rounds. This is not a plinker. Its a weapon that after some breaking in, you should be able to trust to work in that dire situation to protect you if ever needed.
I recommend the M-Pro 7 LPX. It does a really good job at keeping the barrel clean too. And great for surface protection against rust. Check it out. Anyway, I hope this info helps some folks.