Hornady 300 Blackout 190 Grain Sub-X Review: Suppressor Ready

If you’re looking for a high-quality subsonic round for your favorite 300 AAC Blackout rifle, then you can’t go wrong with the Hornady 190 grain Sub-X. This round is a perfect choice for deer hunting in the Midwest, blasting feral hogs down in Texas, and everything in between.

As this round is designed to produce excellent expansion at subsonic velocities, it’s the answer to every 300 Blackout hunter’s prayers. When paired with a suppressor this ammo is not only hearing safe, but darn near Hollywood quiet, making it ideal for fast follow-up shots and multiple target engagements out to 200 yards.

But if you’ve been wondering if the Hornady Subsonic juice is worth the squeeze, then you clicked on the right article. In this Hornady 300 Blackout 190 gr Sub-X review, I’ll share the details you need to know about this subsonic ammunition and why it’s a great choice for your suppressed or unsuppressed 300 Blackout bolt-action or AR-15 carbine.

If you’re ready to buy, we have Hornady 300 Blackout 190 Gr Sub-X ammo in stock and ready to ship to your door. Otherwise, keep reading for the full review.

Hornady 300 Blackout 190 Gr Sub-X Ammo Overview

Back in 1949 when Joyce Hornady founded his company, the needs of the American shooter were relatively simple. Most of them were returning from WWII and had experience using a 30-caliber bolt-action or semi-auto rifle.

It makes sense that Hornady’s first major success was a 30-cal 150 grain Spire Point hunting bullet. With so many surplus M1 Garands and 1903 Springfields hitting the market, this bullet mated perfectly with the 30-06 Springfield round, which was already popular for hunting.

However, as time forged on, the needs of the American shooter evolved with the advent of new cartridges and firearms. Sure, most 2A enthusiasts have a semi-automatic rifle like an AR-15 carbine or Ruger Mini-14 chambered in 5.56 NATO, but that same rifle can also be chambered in calibers like 300 Blackout, 6.5 Grendel, 6.8 SPC, or 450 Bushmaster.

Out of all these rifle calibers, the 300 AAC Blackout has been (by a wide margin) the most successful new cartridge adapted to the AR platform. The 300 Blackout (or 300 BLK for short) was developed to increase the stopping power of the AR-15.

The 300 BLK is unique in that it can be fired at supersonic and subsonic muzzle velocities, giving shooters an incredible amount of versatility in terms of ammo selection. Developed to be fired with or without a suppressor, a 300 Blackout will experience a full powder burn in just 9 inches of barrel length, making it an ideal candidate for a SBR (short barrel rifle).

Although supersonic 300 Blackout ammo has proven to be extremely effective for hunting medium sized game like whitetail deer and hogs, subsonic ammo provided unreliable expansion at best. That is, until Hornady released the Sub-X bullet.

The Hornady 190 gr Sub-X bullet was designed to provide excellent expansion at low velocities.

To accomplish this, Hornady began with a soft lead core and encased it in a thin gilding metal jacket. Unlike tougher jacket metals used by traditional hunting bullets, gilding metal will deform and expand at lower pressures and is perfect for subsonic use.

To further increase expansion, Hornady topped their Sub-X bullets with the patented Flex Tip. This is the same polymer tip utilized in their LeveRevolution and Critical Duty lines of ammunition that has proven itself in the field for years.

Once the polymer tip encounters soft tissue, it plunges into the hollow point cavity to initiate rapid expansion of the jacket and lead core.

The result is that the Hornady Sub-X bullet has excellent weight retention, creates devastating wound channels, and can ethically harvest medium and small game animals with relative ease. So, if you’re looking for some subsonic ammunition for your favorite semi-automatic or bolt-action hunting rifle, then you really should give Hornady Subsonic 300 Blackout 190 grain Sub-X a look!

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