my suppressed marlin sbl 45/70 is real quiet with sub sonic ammo and sounds like a 22 lr with supersonic ammo. It also has much less recoil than my guide gun (also 45/70) and the guide gun has a ported barrel and is much louder. Even at night there is no flash.
With my subsonic load I still have about 1000 foot pounds at 150 yards
Shot placement is everything! I would rather take a round of 50BMG to the foot than a 22short to the base of the skull.
all 23 of my guns are 45/70 govt 357 mag, 22 or 12 ga... I believe in keeping it simple