{"id":7821,"date":"2026-07-26T22:56:41","date_gmt":"2026-07-26T22:56:41","guid":{"rendered":"https:\/\/landmarkfirearms.com\/ca\/?post_type=product&p=7821"},"modified":"2026-07-26T22:57:08","modified_gmt":"2026-07-26T22:57:08","slug":"hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20","status":"publish","type":"product","link":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/","title":{"rendered":"Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20"},"content":{"rendered":"

Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20<\/h1>\n
\n

Product Overview<\/h2>\n
\n
\n
\n

Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20<\/a>. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The 190 grain Sub-X (Subsonic – eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet\u2019s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand reliably at low velocities. Performance of the 300 Blackout Subsonic load meets or exceeds FBI Protocol terminal ballistic test requirements.<\/p>\n

 <\/p>\n

Other features:<\/b><\/p>\n

\u2022 Impact velocities of 960 to 1,020 fps into ballistic gelatin, providing 16-18\u201d penetration and 90%+ weight retention.<\/p>\n

\u2022 Designed to expand at velocities down to 900 fps.<\/p>\n

\u2022 Loaded with unique powders optimized for subsonic use, the low flash signature is ideal for both suppressed and unsuppressed performance.<\/p>\n

\u2022 Bullets feature a cannelure for a positive case crimp for use in semi-autos.<\/p>\n

\u2022 Designed specifically to fit, feed, and function in a variety of firearms including gas system guns.<\/p>\n

 <\/p>\n<\/div>\n

\"Hornady<\/a><\/div>\n<\/div>\n

Made In\u00a0United States of America<\/span><\/p>\n

\"warning-icon\"WARNING:\u00a0<\/strong>This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to – www.P65Warnings.ca.gov.<\/div>\n<\/div>\n<\/section>\n
\n

Specifications<\/h2>\n
\n

Product Information<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Cartridge<\/td>\n300 AAC Blackout (7.62x35mm)<\/td>\n<\/tr>\n
Grain Weight<\/td>\n190 Grains<\/td>\n<\/tr>\n
Quantity<\/td>\n20 Round<\/td>\n<\/tr>\n
Muzzle Velocity<\/td>\n1050 Feet Per Second<\/td>\n<\/tr>\n
Muzzle Energy<\/td>\n465 Foot Pounds<\/td>\n<\/tr>\n
Bullet Style<\/td>\nPolymer Tip<\/td>\n<\/tr>\n
Bullet Brand And Model<\/td>\nHornady FTX<\/td>\n<\/tr>\n
Lead Free<\/td>\nNo<\/td>\n<\/tr>\n
Case Type<\/td>\nBrass<\/td>\n<\/tr>\n
Primer<\/td>\nBoxer<\/td>\n<\/tr>\n
Corrosive<\/td>\nNo<\/td>\n<\/tr>\n
Reloadable<\/td>\nYes<\/td>\n<\/tr>\n
G1 Ballistic Coefficient<\/td>\n0.437<\/td>\n<\/tr>\n
Sectional Density<\/td>\n0.286<\/td>\n<\/tr>\n
Test Barrel Length<\/td>\n16 Inches<\/td>\n<\/tr>\n
Velocity Rating<\/td>\nSubsonic<\/td>\n<\/tr>\n
Country of Origin<\/td>\nUnited States of America<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
\n
<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    \n
  • Product #:\u00a0741787<\/li>\n
  • \u00a0Manufacturer #:\u00a080877<\/li>\n
  • \u00a0UPC #:\u00a0090255808773<\/li>\n<\/ul>\n","protected":false},"featured_media":7868,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[206],"product_tag":[],"class_list":["post-7821","product","type-product","status-publish","product_cat-ammunition-for-sale","first","instock","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"\nBuy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20 | Canada<\/title>\n<meta name=\"description\" content=\"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The 190 grain Sub-X (Subsonic - eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet\u2019s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand reliably at low velocities. Performance of the 300 Blackout Subsonic load meets or exceeds FBI Protocol terminal ballistic test requirements.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20 | Canada\" \/>\n<meta property=\"og:description\" content=\"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The 190 grain Sub-X (Subsonic - eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet\u2019s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand reliably at low velocities. Performance of the 300 Blackout Subsonic load meets or exceeds FBI Protocol terminal ballistic test requirements.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/\" \/>\n<meta property=\"og:site_name\" content=\"Canada\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-26T22:57:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png\" \/>\n\t<meta property=\"og:image:width\" content=\"733\" \/>\n\t<meta property=\"og:image:height\" content=\"479\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/\",\"url\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/\",\"name\":\"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20 | Canada\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2026\\\/07\\\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png\",\"datePublished\":\"2026-07-26T22:56:41+00:00\",\"dateModified\":\"2026-07-26T22:57:08+00:00\",\"description\":\"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The 190 grain Sub-X (Subsonic - eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet\u2019s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand reliably at low velocities. Performance of the 300 Blackout Subsonic load meets or exceeds FBI Protocol terminal ballistic test requirements.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/#primaryimage\",\"url\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2026\\\/07\\\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png\",\"contentUrl\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2026\\\/07\\\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png\",\"width\":733,\"height\":479},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/#website\",\"url\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/\",\"name\":\"Canada\",\"description\":\"Premium Guns, Ammo & Tactical Gear\",\"publisher\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/#organization\",\"name\":\"Canada\",\"url\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2026\\\/07\\\/logo-land.png\",\"contentUrl\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2026\\\/07\\\/logo-land.png\",\"width\":927,\"height\":221,\"caption\":\"Canada\"},\"image\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20 | Canada","description":"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The 190 grain Sub-X (Subsonic - eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet\u2019s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand reliably at low velocities. Performance of the 300 Blackout Subsonic load meets or exceeds FBI Protocol terminal ballistic test requirements.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/","og_locale":"en_US","og_type":"article","og_title":"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20 | Canada","og_description":"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The 190 grain Sub-X (Subsonic - eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet\u2019s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand reliably at low velocities. Performance of the 300 Blackout Subsonic load meets or exceeds FBI Protocol terminal ballistic test requirements.","og_url":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/","og_site_name":"Canada","article_modified_time":"2026-07-26T22:57:08+00:00","og_image":[{"width":733,"height":479,"url":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/","url":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/","name":"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20 | Canada","isPartOf":{"@id":"https:\/\/landmarkfirearms.com\/ca\/#website"},"primaryImageOfPage":{"@id":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/#primaryimage"},"image":{"@id":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/#primaryimage"},"thumbnailUrl":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png","datePublished":"2026-07-26T22:56:41+00:00","dateModified":"2026-07-26T22:57:08+00:00","description":"Buy Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20. Hornady 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The 190 grain Sub-X (Subsonic - eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet\u2019s flat profile and the patented Flex Tip insert within its hollow-point cavity to help it expand reliably at low velocities. Performance of the 300 Blackout Subsonic load meets or exceeds FBI Protocol terminal ballistic test requirements.","breadcrumb":{"@id":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/#primaryimage","url":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png","contentUrl":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-Hornady-Subsonic-Ammunition-300-AAC-Blackout-190-Grain-Sub-X-FTX-Box-of-20.png","width":733,"height":479},{"@type":"BreadcrumbList","@id":"https:\/\/landmarkfirearms.com\/ca\/product\/hornady-subsonic-ammunition-300-aac-blackout-190-grain-sub-x-ftx-box-of-20\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/landmarkfirearms.com\/ca\/"},{"@type":"ListItem","position":2,"name":"Shop","item":"https:\/\/landmarkfirearms.com\/ca\/shop\/"},{"@type":"ListItem","position":3,"name":"Hornady Subsonic Ammunition 300 AAC Blackout 190 Grain Sub-X FTX Box of 20"}]},{"@type":"WebSite","@id":"https:\/\/landmarkfirearms.com\/ca\/#website","url":"https:\/\/landmarkfirearms.com\/ca\/","name":"Canada","description":"Premium Guns, Ammo & Tactical Gear","publisher":{"@id":"https:\/\/landmarkfirearms.com\/ca\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/landmarkfirearms.com\/ca\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/landmarkfirearms.com\/ca\/#organization","name":"Canada","url":"https:\/\/landmarkfirearms.com\/ca\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/landmarkfirearms.com\/ca\/#\/schema\/logo\/image\/","url":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/logo-land.png","contentUrl":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/logo-land.png","width":927,"height":221,"caption":"Canada"},"image":{"@id":"https:\/\/landmarkfirearms.com\/ca\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/product\/7821","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/comments?post=7821"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/media\/7868"}],"wp:attachment":[{"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/media?parent=7821"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/product_brand?post=7821"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/product_cat?post=7821"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/landmarkfirearms.com\/ca\/wp-json\/wp\/v2\/product_tag?post=7821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}