Blackout Silverback 9MM 135gr, Self Defense, 20 Round Box, Subsonic

This listing covers the Blackout Silverback 9MM 135gr, Self Defense, 20 Round Box, Subsonic. Rather than repeat the box copy, the sections below set out what the projectile does and where 9mm fits.

Specifications

Cartridge	9mm
Bullet weight	135 grain
Projectile	Solid Copper Subsonic
Bullet diameter	.355
Typical muzzle velocity	1,000 to 1,250 fps
Usual twist rate	1:10
Platform	pistol and PCC
Rounds per pack	20
SKU	SB9135SD
Price	$29.99
Cost per round	$1.499

Terminal behaviour of the solid copper subsonic design

This is a a solid copper design intended for subsonic velocities, where conventional lead hollow points typically fail to open.

It is worth separating weight from construction when comparing loads. They are independent variables, and construction is the one that decides outcome.

9mm in practice

Standard pressure loads sit near the sound barrier, so subsonic-specific loads matter for suppressed use.

Muzzle velocity for 9mm typically runs 1,000 to 1,250 fps, from a pistol and PCC platform with a 1:10 twist. Published figures are a starting point, not a specification; chronograph your own rifle before you trust a number.

Choosing this bullet weight

At 135 grain this is on the lighter side for 9mm. Lighter bullets leave the muzzle faster and shoot flatter, which helps on smaller targets and at distance, but they bleed velocity sooner and depend more on impact speed to do their job.

Cost per round

20 rounds at $29.99 works out at $1.499 per round. A box this size suits load development, hunting stock and defensive carry rather than high volume practice.

Shipping and legal notes

Shipping rules for ammunition vary by state and sometimes by city. Some destinations require a licence, an approved recipient, or refuse delivery entirely. Check before you order rather than after. See our shipping and delivery page for the current detail.

Is this the right load for you

Match the load to the job rather than the price. This suits suppressed shooting, where staying under the sound barrier is the whole point and bullet design has to compensate for low velocity.

Barrel length and velocity

Velocity scales with barrel length, and the effect is largest on lighter, faster bullets. Check what your own barrel actually delivers. For 9mm specifically, expect 1,000 to 1,250 fps as the published band and treat your own chronograph as the authority.

Keeping it serviceable

Ammunition stores for decades if you keep moisture and temperature swings away from it. Sealed containers with a desiccant pack beat an open box in a shed every time.

See also

Browse 9mm ammunition for other weights and projectile types, or run your setup through the ballistics calculator.

How 9mm compares

Against .45 ACP it gives up frontal area and gains capacity, flatter trajectory and much cheaper practice. Against .380 ACP it is simply more cartridge in every respect.

Cartridge arguments usually come down to people optimising for different things without saying so. Decide what you are optimising for first.

How this is stored

We stock factory loaded ammunition only, no remanufactured or reloaded product. Stock is stored indoors, rotated oldest first, and packed to keep projectiles protected on the way to you.

If this is your first purchase in this calibre, buy one box before you buy ten. Rifles are individual, and a load that groups beautifully in one barrel can string in another for no obvious reason.

Frequently asked questions

What rifle does 9mm run in?

9mm is normally chambered in a pistol and PCC platform with a 1:10 twist. Standard pressure loads sit near the sound barrier, so subsonic-specific loads matter for suppressed use.

What velocity should I expect from 9mm?

Typically 1,000 to 1,250 fps. Barrel length, temperature and lot all shift it, so chronograph your own rifle.

Is the solid copper subsonic projectile suitable for what I am shooting?

It is a a solid copper design intended for subsonic velocities, where conventional lead hollow points typically fail to open. Match that against your intended use before buying.

Why choose 135 grain?

Weight sets the trade between velocity and momentum. 135 grain is one point on that curve; the right pick depends on your barrel, your distance and your target rather than on the number itself.

What is in the pack?

20 rounds at $29.99, which is $1.499 per round.

Is this a backorder?

No. This is stocked inventory, not a backorder or a pre-sale.

Can you ship this to my state?

In most cases yes, though several states and cities restrict ammunition shipments or require a licence. Our shipping page lists current restrictions.

Do you offer bulk pricing?

Larger pack sizes carry a lower cost per round, which is listed on each product page so you can compare directly rather than doing the arithmetic yourself.

Can I reload this brass?

Most of our loaded ammunition uses reloadable boxer primed brass. Check the individual listing if you intend to reload, since some training and steel cased lines are not reloadable.

Do you sell remanufactured ammunition?

No. Everything listed is sealed factory ammunition.