Very impressed with this can!
I finally got the chance to shoot the SF SPS 300, couldn't be happier with my purchase. It was mounted on a 10.3" 300BO and shot with both subs and supers; it is stupid quiet with subsonic rounds and hearing safe with the supersonic. The action cycling drowned out all other sounds except the round smacking steel with the subs. Seriously. Changed the host to a .308; it sounds great. Use it exclusively on the 300OB and a 5.56 with a 14.5" barrel. Have not noticed any POI shift.