How accurate do you find the subsonic 300BO with the can vs the 308 win subsonic with the can?
Don't have a can yet, but getting one is high on my acquisition list. THat said, I plan to get a set-up where I can use the same can on my .300 BLK, .308 Scout and AR-15. (Knowing it won't be ideal on the .223.)
The .300BLK with the 208g subsonic A-MAX is quite accurate - more so than I will need. (i.e. I was able to blast clay pigeons at 100 with them.)