It will be louder to your neighbors on the range, not to yourself. Also, some outfitters don't like their guests to use them. That said, the difference it makes on an overbore cartridge like the 300 RUM is huge, lots of gases to redirect. Mine shoots like a 223 with and a 30-06 without (20 lbs scoped weight help). So, if you go hunting with it alone, by all means put one on.
I used to love being able to hit hard at 1000 yards. As I get older I find hitting a mini ram at 200 yards with the 22 oddly more satisfying.