So here is my thoughts. The performance to my ear is identical with 300BLK to the form one subgun can I built last month and I am very surprised by that. It had an inch more internal volume and more baffles with tighter bores. At first I was disappointed but I am doing this for the knowledge and I learned a lot about suppressors and the tech so I am kind of satisfied learning what I now know so it was worth it.
The only advantage that I gained with this can over the subgun can is I would trust the mounting system shooting supersonic 300BLK and 556/223 and probably would just keep to subsonics with the 3 lug. It does appear that the Griffin Revolution internal 3 lug mount, made of steel vs the one I'm using made of aluminum is rated for 300 supers and 556 though. So it is possible to make one that would work on anything I shoot using 3 lug.
It taught me a lot about volume, baffle design and answered a lot of questions I had. For example, why does my Gemtech Multimount greatly out perform my Bowers Cac 9. Because baffle design is much more important then the size of the suppressor. I also learned that my baffle design has been around since the beginning (thanks to Strobro32), used by Hirum Maxum and performs better then most cone and M baffles and as good as some of the best K baffles in modern cans. I also experienced my first POI shift and learned about that. Caused by the weight of the suppressor on the unsupported free float barrel it shoots 3 inches lower at 50 yards. The 3 lug upper doesn't shift even though they weigh the same because the barrel is supported by the hand guard end cap and all of my other weapons I shoot suppressed have heavier or short barrels that don't seem to suffer from it like the longer barreled weapon.
I think multi caliber is the future of suppressors. I think the subgun can verified that and would be my choice if I could only pick one. It explains why all the manufacturers are going in that direction. The cans I built perform as good as or better then any of the factory cans I have or have shot. I have one more can to build, another subgun can. The K will bust the the myths passed in this forum about the need for a huge can for full auto, although I think I have done that already. I paid for the form one so I might as well complete it. I may build out a new 22 can in the future, I am undecided.
Next time I am shooting with someone I will do some comparison videos of different cans shooting.