Sorry, I’m a little late to this conversation. I also read NATO reloading and in the past two years I’ve experimented with about 15 different powders. I am not a competitor, just somebody who likes recreational target shooting and reloading.
I got best all-around results with silhouette actoss different bullet weights. Silhouette has a solid reputation for this type of performance. I also tried true blue, which I love, but didn’t get as good results with accuracy. I will continue using this in 45 ACP, which gives excellent accuracy in that cartridge.
For 147 grain bullets, my preferred weight, N330 and Autocomp were the best with my gun and bullets. After their testing, NATO reloading said they think N330 and N340 are the best 9mm powders. The best powders for you will vary based on your personal preferences and what your gun likes.
If you want higher performance, I would highly recommend N350 and Accurate #7. I bought these to get a little more velocity with 147 grain bullets and they are both superb. These were my last two powders that I tested and I wish I would’ve started using them earlier. N350 is a different beast than medium burning powders and has some punch. It is also very accurate with 115 and 124 grain bullets. It will put a smile on your face. Accurate #7 so far has been a little more accurate. I still want to do a lot more testing with both powders.
From here on out, I just plan on using Accurate #7, N350, N330, and on occasion silhouette.