In .177 I have had good luck with the winchester round nose and the Tomahawk's both 7.6gr the pro magnum .177 shot crappy in everthing I tried these are all made by Gamo
Just get an idustrial Nitrogen regulator rated for 4500 psi from the local welding supply co Harris , Victor ,Smith and many more probably in the 3-4 hundred$ range but shop around find out who repairs reg's in your area might find deal on used
Thats the one I have it's been going for almost 2 years no auto anything and I only feed my compressors Nitrogen . Do Not use Royal Purple I use chemlube 751 also hear good things about Rarius?? (spelling)
Just to let everyone know I got my Notos Lever from Saneroner and installed it on my Notos and it works great. The guy was a pleasure to deal with. He shipped well packed and his price was fair, don't hesitate if you would like to get one from him.
You need an hr meter too https://www.amazon.com/gp/product/B08PYLV4X8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B01MRR4HGM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1