Is it true that any bullet that produces a muzzle velocity under 1,050 fps or less is subsonic?

Also what are some good 9mm subsonic ammo?

Good .40 S&W ammo?

and lastly good 556 that will properly feed and not make your ar essentially a "bolt gun"? ? ?

No factory 556 ammo will cycle the action. Only tuned handloads/rifles will cycle subs...

300BLK is another story...

And i believe its the 180gr 40's that are subsonic...I don't have a 40, so please don't quote me.

~WTS

When choosing .22 ammo I always look for stuff thats 1150 fps & under.

But it all depends on the temp and elevation

Like others have said...main factors include humitidy, temp, and barrel length.

I live in Texas so I don't have that much to worry about because it is always so F'n hot!

Any sources for SS in. 308?

My buddy says he'll make me some, but I've been waiting over year - and I'd really like to see just how effective my HVT actually is!

Thanks!

AIM has .308 180gr subs for $21.95 here . They're out of GUNN Blackout in 180 though.

Posted Via AR15.Com Mobile

Is there a specific reason you're using 5.56 subs?

Correct all 180gr and if you can find it 200gr in 40 are subs; the 165gr COULD be depending on load and barrel length.

I can only speak for 9mm subsonics, all listed are 147gr except the 140gr S+B
I've shot each of them, and still have many on hand from a few years ago, when they were most all around $210/1000 pre-election.
All are subsonic in my pistols of course, and in my semi auto rifles up to 16"

* Federal American Eagle AE9N2 round nose
* CCI Blazer TMJ aluminum case round nose, alum cases not reccommended to reload. (no lead is exposed to the powder charge)
* Speer Lawman round nose

The following are flat or truncated noses that may or may not feed in your system. They work fine in 3/4 of my toys:
* AE9FP flat point
* Winchester Winclean BEB (no lead is exposed to the powder charge)
* S+B 140gr probably the quietest of all 9mm subs I've shot suppressed, including my own optimal reloads

Many can be found here: Natchez

I've not tried, but Georgia Ammo 147gr reloads are said to be reliable and quiet, but their prices have caught up to commercial ammo @ $280/1000
I no longer buy factory 9mm subs, they simply cost too much IMO
Of course you can do quite well by reloading your own. i.e. quieter, less expensive, tuned for your guns, much more enjoyable to shoot, etc.
A hobby for your hobby, and its quite easy to reload pistol caliber ammo reliably!

A standard full power load should not damage a can. However, if your worried about it, i would consult the manufactorer. My AAC cyclone has not seen a single sub sonic load yet. All it has had through it is Black hills 175 and 118lr.

Absolutely.


Ask yourself why there is a report at all. It is the expansion of high-pressure gasses into a low-pressure environment. That rapid expansion creates a pressure wave and, of course, those waves are what we hear. Any time you have high-pressure fluids released into a low-pressure environment, you're going to have a sound wave generated from it. Engine exhaust, a balloon popping, even thunder or the sound of electric arc (energy release heats up the surrounding air).

The suppressor only affects the muzzle report, or the release of propellant gasses into the atmosphere. It's essentially a volume chamber that holds onto the gasses longer, releasing them more slowly and at a lower pressure. Lower pressure drop = less sound.

The forward motion of the bullet does the same thing. The bullet has to move the air out of the way as it passes. The air is accelerated and compressed, and then it rapidly decompresses as the bullet passes. When the bullet travels faster than the speed of sound, it propagates a shock wave in that compression zone. Subsonic bullets still make noise, but there is no leading edge shockwave.

A suppressor helps out with either sub- or supersonic ammunition, but people select subsonic ammunition because the effect is much more dramatic - it is often hearing safe as well.

Do you HAVE to run subsonic and supersonic? Can I run regular 115gr ammo?