I think if you are wanting most versatile list ie. the ability to suppress the widest range of common calibers, you are going to get similar variations of your list–a .30 cal rifle can, a .45 pistol can, and a .22 can of some sort. I would also go with the Saker 7.62 and the Osprey .45. I would get the spectre .22, since you can use it on the 5.7, .22 mag and hornet and others in addition to .22 LR. I guess I’m just a SliencerCo fanboy judging from my list.
Actually seeing some nice variety among people who have replied, which is what I was hoping to see. Might be something in there that didn’t occur to everyone. Thanks to those who put up their picks so far.
This thread is exactly where I’m at right now. I’ve come to the same conclusion: 7.62, .45, .22. I’m only really interested in calibers that are truly quiet with a suppressor (i.e., not 5.56). I’ve heard that folks are getting good results quieting 9mm with a .45 can and the 7.62 can is mainly for 300 BLK subs. For a .22 can, I was thinking the Thompson Machine “Operative” is probably the most practical set up. Can a .22 can really hush up a .22 pistol?