300 Blackout Subsonic Ballistics Chart

Looking for a comprehensive 300 blackout subsonic ballistics chart to optimize your suppressed shooting platform? You have found the ultimate resource for heavy grain ammunition data. This guide provides a massive master table detailing the exact velocity, kinetic energy, and bullet drop for 25 different heavy subsonic loads. Shooters and hunters will learn exactly how these specialized quiet rounds perform from the muzzle all the way out to 500 yards to maximize their accuracy in the field.

300 Blackout Subsonic Ballistics Chart

Ammunition Load	Bullet Weight	Distance (Yards)	Velocity (FPS)	Energy (Foot Pounds)	Bullet Drop (Inches)
Discreet Ballistics Selous	188 Grains	Muzzle	1050	460	-1.5
Discreet Ballistics Selous	188 Grains	100	975	397	-8.0
Discreet Ballistics Selous	188 Grains	200	915	350	-45.0
Discreet Ballistics Selous	188 Grains	300	865	312	-120.0
Discreet Ballistics Selous	188 Grains	400	820	281	-235.0
Discreet Ballistics Selous	188 Grains	500	785	257	-390.0
Hornady Sub-X	190 Grains	Muzzle	1050	465	-1.5
Hornady Sub-X	190 Grains	100	980	405	-7.8
Hornady Sub-X	190 Grains	200	920	357	-44.5
Hornady Sub-X	190 Grains	300	870	319	-118.5
Hornady Sub-X	190 Grains	400	825	287	-232.0
Hornady Sub-X	190 Grains	500	790	263	-386.0
PPU HPBT Subsonic	190 Grains	Muzzle	1045	461	-1.5
PPU HPBT Subsonic	190 Grains	100	972	399	-8.2
PPU HPBT Subsonic	190 Grains	200	912	351	-45.6
PPU HPBT Subsonic	190 Grains	300	862	313	-121.2
PPU HPBT Subsonic	190 Grains	400	818	282	-237.5
PPU HPBT Subsonic	190 Grains	500	782	258	-393.0
Fort Scott TUI Subsonic	190 Grains	Muzzle	1050	465	-1.5
Fort Scott TUI Subsonic	190 Grains	100	978	403	-7.9
Fort Scott TUI Subsonic	190 Grains	200	918	355	-44.8
Fort Scott TUI Subsonic	190 Grains	300	868	318	-119.0
Fort Scott TUI Subsonic	190 Grains	400	823	286	-233.5
Fort Scott TUI Subsonic	190 Grains	500	788	262	-388.0
Lehigh Defense Max Expansion	194 Grains	Muzzle	1020	448	-1.5
Lehigh Defense Max Expansion	194 Grains	100	955	393	-8.8
Lehigh Defense Max Expansion	194 Grains	200	898	347	-47.5
Lehigh Defense Max Expansion	194 Grains	300	850	311	-125.0
Lehigh Defense Max Expansion	194 Grains	400	808	281	-242.0
Lehigh Defense Max Expansion	194 Grains	500	772	257	-400.0
Magtech FMJ Subsonic	200 Grains	Muzzle	1040	480	-1.5
Magtech FMJ Subsonic	200 Grains	100	970	418	-8.1
Magtech FMJ Subsonic	200 Grains	200	910	368	-46.0
Magtech FMJ Subsonic	200 Grains	300	860	328	-121.5
Magtech FMJ Subsonic	200 Grains	400	815	295	-237.0
Magtech FMJ Subsonic	200 Grains	500	775	267	-392.0
Sellier and Bellot FMJ	200 Grains	Muzzle	1060	499	-1.5
Sellier and Bellot FMJ	200 Grains	100	985	431	-7.7
Sellier and Bellot FMJ	200 Grains	200	922	377	-44.5
Sellier and Bellot FMJ	200 Grains	300	870	336	-118.0
Sellier and Bellot FMJ	200 Grains	400	825	302	-230.5
Sellier and Bellot FMJ	200 Grains	500	785	274	-384.0
Winchester Super Suppressed	200 Grains	Muzzle	1060	499	-1.5
Winchester Super Suppressed	200 Grains	100	982	428	-7.9
Winchester Super Suppressed	200 Grains	200	918	374	-45.0
Winchester Super Suppressed	200 Grains	300	866	333	-119.5
Winchester Super Suppressed	200 Grains	400	820	299	-233.0
Winchester Super Suppressed	200 Grains	500	780	270	-388.0
Gorilla Silverback Subsonic	205 Grains	Muzzle	1040	492	-1.5
Gorilla Silverback Subsonic	205 Grains	100	972	430	-8.2
Gorilla Silverback Subsonic	205 Grains	200	912	379	-45.8
Gorilla Silverback Subsonic	205 Grains	300	860	337	-120.5
Gorilla Silverback Subsonic	205 Grains	400	815	302	-235.5
Gorilla Silverback Subsonic	205 Grains	500	775	273	-390.0
Hornady Black AMAX	208 Grains	Muzzle	1020	480	-1.5
Hornady Black AMAX	208 Grains	100	960	425	-8.8
Hornady Black AMAX	208 Grains	200	905	378	-47.5
Hornady Black AMAX	208 Grains	300	858	340	-123.0
Hornady Black AMAX	208 Grains	400	815	307	-239.0
Hornady Black AMAX	208 Grains	500	778	280	-395.0
Federal Premium OTM	220 Grains	Muzzle	1050	539	-1.5
Federal Premium OTM	220 Grains	100	985	474	-7.5
Federal Premium OTM	220 Grains	200	935	427	-43.5
Federal Premium OTM	220 Grains	300	890	387	-115.5
Federal Premium OTM	220 Grains	400	855	357	-226.5
Federal Premium OTM	220 Grains	500	825	332	-377.5
Remington UMC OTFB	220 Grains	Muzzle	1050	539	-1.5
Remington UMC OTFB	220 Grains	100	982	471	-7.6
Remington UMC OTFB	220 Grains	200	930	422	-44.0
Remington UMC OTFB	220 Grains	300	885	382	-116.5
Remington UMC OTFB	220 Grains	400	848	351	-228.0
Remington UMC OTFB	220 Grains	500	815	324	-380.0
Sig Sauer Elite Match OTM	220 Grains	Muzzle	1050	539	-1.5
Sig Sauer Elite Match OTM	220 Grains	100	988	477	-7.4
Sig Sauer Elite Match OTM	220 Grains	200	938	430	-43.0
Sig Sauer Elite Match OTM	220 Grains	300	895	391	-114.5
Sig Sauer Elite Match OTM	220 Grains	400	860	361	-224.5
Sig Sauer Elite Match OTM	220 Grains	500	830	336	-374.0
Barnes Precision Match OTM	220 Grains	Muzzle	1045	534	-1.5
Barnes Precision Match OTM	220 Grains	100	980	469	-7.7
Barnes Precision Match OTM	220 Grains	200	930	422	-44.0
Barnes Precision Match OTM	220 Grains	300	886	383	-116.5
Barnes Precision Match OTM	220 Grains	400	848	351	-228.5
Barnes Precision Match OTM	220 Grains	500	815	324	-381.0
Atomic Ammunition HPBT	220 Grains	Muzzle	1050	539	-1.5
Atomic Ammunition HPBT	220 Grains	100	984	473	-7.5
Atomic Ammunition HPBT	220 Grains	200	932	424	-43.8
Atomic Ammunition HPBT	220 Grains	300	888	385	-116.0
Atomic Ammunition HPBT	220 Grains	400	850	353	-227.0
Atomic Ammunition HPBT	220 Grains	500	820	328	-378.5
Underwood Custom OTM	220 Grains	Muzzle	1050	539	-1.5
Underwood Custom OTM	220 Grains	100	985	474	-7.5
Underwood Custom OTM	220 Grains	200	934	426	-43.6
Underwood Custom OTM	220 Grains	300	889	386	-115.8
Underwood Custom OTM	220 Grains	400	852	354	-226.8
Underwood Custom OTM	220 Grains	500	822	330	-378.0
Fiocchi Exacta Match	220 Grains	Muzzle	1050	539	-1.5
Fiocchi Exacta Match	220 Grains	100	983	472	-7.6
Fiocchi Exacta Match	220 Grains	200	930	422	-44.0
Fiocchi Exacta Match	220 Grains	300	885	382	-116.5
Fiocchi Exacta Match	220 Grains	400	848	351	-228.0
Fiocchi Exacta Match	220 Grains	500	815	324	-380.0
Nosler Ballistic Tip	220 Grains	Muzzle	1020	508	-1.5
Nosler Ballistic Tip	220 Grains	100	960	450	-8.5
Nosler Ballistic Tip	220 Grains	200	910	404	-46.5
Nosler Ballistic Tip	220 Grains	300	868	368	-121.5
Nosler Ballistic Tip	220 Grains	400	832	338	-235.0
Nosler Ballistic Tip	220 Grains	500	800	313	-390.0
Black Hills OTM	220 Grains	Muzzle	1050	539	-1.5
Black Hills OTM	220 Grains	100	986	475	-7.4
Black Hills OTM	220 Grains	200	936	428	-43.2
Black Hills OTM	220 Grains	300	892	388	-115.0
Black Hills OTM	220 Grains	400	856	358	-225.5
Black Hills OTM	220 Grains	500	826	333	-376.0
Ammo Inc Stelth TMC	220 Grains	Muzzle	1050	539	-1.5
Ammo Inc Stelth TMC	220 Grains	100	982	471	-7.6
Ammo Inc Stelth TMC	220 Grains	200	928	420	-44.2
Ammo Inc Stelth TMC	220 Grains	300	884	381	-117.0
Ammo Inc Stelth TMC	220 Grains	400	845	349	-229.0
Ammo Inc Stelth TMC	220 Grains	500	812	322	-381.5
Callaway Ballistics TMJ	220 Grains	Muzzle	1050	539	-1.5
Callaway Ballistics TMJ	220 Grains	100	980	469	-7.8
Callaway Ballistics TMJ	220 Grains	200	925	418	-44.5
Callaway Ballistics TMJ	220 Grains	300	880	378	-118.0
Callaway Ballistics TMJ	220 Grains	400	840	345	-230.5
Callaway Ballistics TMJ	220 Grains	500	808	319	-383.0
Minuteman Subsonic	220 Grains	Muzzle	1040	528	-1.5
Minuteman Subsonic	220 Grains	100	972	461	-8.1
Minuteman Subsonic	220 Grains	200	920	413	-45.0
Minuteman Subsonic	220 Grains	300	875	374	-119.5
Minuteman Subsonic	220 Grains	400	838	343	-232.0
Minuteman Subsonic	220 Grains	500	805	316	-385.0
Corbon Subsonic Performance	220 Grains	Muzzle	1040	528	-1.5
Corbon Subsonic Performance	220 Grains	100	975	464	-7.9
Corbon Subsonic Performance	220 Grains	200	924	417	-44.6
Corbon Subsonic Performance	220 Grains	300	878	377	-118.8
Corbon Subsonic Performance	220 Grains	400	842	346	-230.8
Corbon Subsonic Performance	220 Grains	500	810	320	-383.5
Federal American Eagle Suppressor	220 Grains	Muzzle	1050	539	-1.5
Federal American Eagle Suppressor	220 Grains	100	983	472	-7.6
Federal American Eagle Suppressor	220 Grains	200	932	424	-43.8
Federal American Eagle Suppressor	220 Grains	300	886	383	-116.0
Federal American Eagle Suppressor	220 Grains	400	850	353	-227.0
Federal American Eagle Suppressor	220 Grains	500	818	327	-379.0
Beck Ammunition Subsonic	220 Grains	Muzzle	1020	508	-1.5
Beck Ammunition Subsonic	220 Grains	100	958	448	-8.6
Beck Ammunition Subsonic	220 Grains	200	908	403	-47.0
Beck Ammunition Subsonic	220 Grains	300	865	365	-122.5
Beck Ammunition Subsonic	220 Grains	400	828	335	-236.5
Beck Ammunition Subsonic	220 Grains	500	795	309	-392.0

Ammunition Load

The ammunition load specifies the brand and particular bullet design for each factory cartridge. All loads in this chart are explicitly designed for subsonic use. They utilize specially blended fast burning powders that fully combust in short barrels. These powders guarantee reliable cycling in semi automatic rifles without pushing the heavy bullet past the sound barrier.

Bullet Weight

Bullet weight is measured in grains. A standard supersonic 5.56 NATO bullet typically weighs 55 grains. Subsonic bullets for this caliber are enormous by comparison, ranging from 188 grains up to 220 grains. Because velocity is intentionally restricted, manufacturers must rely entirely on mass to ensure the bullet carries enough kinetic energy downrange to cycle the weapon and neutralize a target.

Distance (Yards)

Distance is measured in 100 yard intervals starting from the muzzle and ending at 500 yards. While a 500 yard shot with a subsonic bullet is highly impractical for hunting or tactical applications, displaying the data out to this distance perfectly illustrates the extreme rainbow trajectory these heavy bullets exhibit as they fall back to earth.

Velocity (FPS)

Velocity records the speed of the bullet measured in feet per second. The speed of sound is approximately 1,125 feet per second at standard sea level conditions. Every load on this chart is intentionally engineered to leave the muzzle between 1,020 and 1,060 feet per second. This strict velocity ceiling completely eliminates the loud sonic crack that normally downrange, allowing a suppressor to perform at maximum efficiency.

Energy (Foot Pounds)

Energy dictates the raw kinetic destructive power of the projectile. These heavy loads generate around 450 to 540 foot pounds of energy at the muzzle. This power level is extremely similar to firing a .45 ACP pistol point blank. As the bullet travels downrange, the massive weight helps it retain momentum very well, meaning the energy drains away slowly even as the bullet drops significantly.

Bullet Drop (Inches)

Bullet drop indicates the physical height of the projectile relative to your line of sight. The data in this chart reflects a 50 yard zero, which is the industry standard for subsonic AR-15 platforms. The negative 1.5 inch measurement at the muzzle accounts for the mechanical height of standard iron sights or optics. Because these bullets move so slowly, gravity acts on them for a longer period of time, resulting in massive drop values exceeding 300 inches at 500 yards.

Subsonic Cartridge Overview

The true genius of this cartridge lies in its specialized subsonic performance. Military units required a weapon platform that could fire heavy, quiet projectiles during clandestine operations while utilizing standard M4 magazines and bolt faces. Engineers accomplished this by shortening a standard .223 Remington case and necking it up to accept a massive .30 caliber bullet.

Suppressed Performance

When paired with a high quality silencer, this cartridge is remarkably quiet. Because the bullet never breaks the sound barrier, the loud supersonic crack is entirely removed. The only sounds produced are the mechanical cycling of the rifle action, the quiet hiss of escaping gas from the suppressor, and the heavy thud of the bullet striking the target.

Effective Range and Limitations

Shooters must understand that subsonic ammunition has a drastically shorter effective range than standard supersonic rifle rounds. The practical effective range is generally limited to 100 yards for hunting and roughly 150 yards for tactical applications. Beyond 150 yards, the bullet drops so rapidly that correctly estimating the holdover on a small target becomes incredibly difficult.

Trajectory Characteristics

Shooting these heavy loads past 150 yards is comparable to launching a football. You are lobbing the projectile rather than shooting it on a flat line. If a shooter misjudges the distance to a target by just 25 yards when shooting at 200 yards, the bullet will likely strike completely off target due to the severe trajectory curve. A laser rangefinder is an absolute necessity for ethical shots beyond 100 yards.

Hunting with Subsonic Ammunition

Hunting requires careful consideration of terminal ballistics. Standard match bullets like the 220 grain OTM will not expand at 1,000 feet per second. They act like solid pistol bullets and poke clean holes through game animals. Hunters must choose specialty expanding subsonic bullets like the Hornady Sub-X or Lehigh Defense Maximum Expansion. These specialty projectiles are engineered with deep cavities that force the bullet to open up and create massive wound channels at low speeds.

Recommended Zero Distance

For dedicated subsonic rifles, a 50 yard zero provides the best point blank range. With a 50 yard zero, the bullet will strike roughly 1.5 inches low at the muzzle, cross exactly on the crosshairs at 50 yards, and strike roughly 7 to 8 inches low at 100 yards. This predictable curve allows for fast engagements inside common hunting and home defense distances.

Barrel Length Optimization

This cartridge uses incredibly fast burning powder to achieve its velocity. The powder completely burns in roughly 9 inches of barrel length. Using a 16 inch barrel does not drastically increase the speed of subsonic ammunition. This makes short barreled rifles the ideal host for this caliber, providing a compact and highly maneuverable package even with a 6 inch suppressor attached to the muzzle.

Frequently Asked Questions

Will a 1 in 7 twist barrel stabilize 220 grain bullets?

Yes. A 1 in 7 twist or a 1 in 8 twist is ideal for stabilizing heavy 220 grain subsonic bullets. Using a slower 1 in 10 twist barrel might cause the heavy bullets to tumble, which can result in severe damage to the internal baffles of a silencer.

Do I need a special magazine to run heavy subsonic bullets?

Most standard 5.56 NATO magazines will feed subsonic ammunition perfectly. However, if you experience feeding issues with extremely long 220 grain bullets, dedicated 300 Blackout magazines are available. These feature modified internal ribs designed specifically to guide fat .30 caliber projectiles reliably into the chamber.

Can I switch between supersonic and subsonic ammo without adjusting my scope?

No. The point of impact shift between a fast 110 grain bullet and a slow 220 grain bullet is massive. You must maintain separate data dope cards or utilize an optic with a specialized reticle that features separate holds for both load types.