Trump warns of 68% tax increase!

[Ninurta]

Suppressors are generally only effective suppressing sub-sonic ammo, regardless of caliber, anyway.  Any ammo which has a velocity above 1,125 fps (at 68F, and at Sea Level; it varies by altitude, air density and several other factors) is considered supersonic.  A suppressor won't suppress any of the supersonic 'crack' heard as the projectile accelerates above the sound barrier because this occurs outside the barrel.

Just thought I'd pass this bit of trivia along for background.  Though slower and less powerful, sub-sonic ammo is about 2x the price of regular ammo...mainly just because they can.

The 10/22 I used was using full-power ammo. Subsonic .22 was in pretty short supply back in those days, although you can get it readily enough now. All I heard at the operator end was the slap pf the bolt as it cycled, although there may have been a supersonic "crack" as the round passed the target on the business end. Part of that was likely due to the design of the suppressor, and it's volume as it enclosed the entire barrel from stem to stern. I'm guessing that bled off enough propellant gasses to reduce the full power cartridges to subsonic speeds at the muzzle exit, effectively turning full power rounds to subsonic rounds.

For subsonic .22, I recommend CCI's subsonic .22 rounds. They are balanced enough to be subsonic, but still powerful enough to properly cycle a semi-automatic action. A lot of the "subsonic" rounds have been so power-reduced that they are unable to properly cycle actions, and so have to be used in single-shots and bolt guns.The last I bought was about 3 years ago, and ran about 20 dollars for a 100 round box of them, so right at 20 cents a round..

Those, along with a suppressor, will allow you to not only protect your hearing, but also to hunt squirrels, groundhogs, and the like without unduly upsetting neighbors... not to mention backyard target practice that sometimes puts overly-sensitive neighbors out of sorts. Here, I don't have to worry about that sort of thing. If I'm not shooting, the neighbors are, so I presume them not to be overly sensitive types. In urban and suburban contexts, however, you never know how sensitive the neighbors might be until the cops come calling to ask you to tone it down.

The M9 in 9mm was a little louder specifically because of that supersonic crack, but it wasn't loud enough to affect hearing. However, while the crack will allow the target to realize it's being shot at, it won't, by itself, allow it to locate the shooter. For that to happen, the target has to be able to hear the initial report of the weapon AND the crack as the projectile passes, so that they can align the two and suss out a location. A little bit of bolt slap won't get the job done, depending on range to target. The "crack" at the muzzle is never audible at the target, either, because it travels with the projectile. All that is heard at the target is the crack as the projectile passes, not the entire route of the bullet.

With supersonic rounds and no suppressor, what you will hear, as the target, will be the report of the weapon and a sizzling noise or "buzzing" like a big angry hornet coming for you along the route of bullet travel. The buzzing is caused by the bullet rapidly displacing the air along it's route, so it gets progressively louder, then loudest as it passes and cracks,and then progressively less loud until the slap noise when it hits something solid behind you. Now, to be fair, that all happens in a fairly rapid succession, so all most folks remember is the "buzz" and the "crack".

It's the buzz and the crack that lets you know to start trying to dig a trench in the ground with your shirt buttons.

.