I have an DD Enticer STi, Resilient Jolene S, Resilient Stacy’s Mom and Griffin Optimus 6. All work well on 6mm cartridges. If weight does not matter the Optimus 6 or Stacy’s Mom would be my choice. They are quiet and designed for 5.56/6mm. If lighter weight is a concern than an Enticer STi if you want 30cal capability. If not, their Wolfhunter should be outstanding can based on their others. The Jolene S is also a great can and is by far the simplest, no nonsense can that works.
I highly recommend you peruse Pew Science. Sort for cans you are considering and for super or subsonic ammo. You may be surprised how many that are recommended on forums, di not score all that great.