Hornady Subsonic 300 Blackout 190gr Sub-X
Hornady's Sub-X 190gr brass-cased subsonic round is positioned as a best-in-class, purpose-built option for suppressed 300 Blackout use thanks to its optimized bullet shape and tight manufacturing tolerances that deliver consistent subsonic velocities and reliable cycling. Compared with cheaper FMJ alternatives on this list it commands a premium but delivers measurable gains in terminal consistency and repeatable point-of-impact, making it a go-to for shooters who prioritize suppression performance and accuracy over raw round count.
Suppressor's best friend
Heavy 190gr stability
Suppressor's best friend
Heavy 190gr stability
Review Summary
"Buyers consistently praise Hornady Subsonic 300 Blackout 190gr Sub-X for reliable feeding, consistent subsonic expansion, and excellent terminal performance in suppressed rifles; a few users note the premium price. Overall it’s viewed as a top-tier subsonic hunting/load-out round for 300 BLK."
Tight groups
190-grain Sub-X bullet engineered for controlled terminal performance at subsonic velocities
Tight groups
190-grain Sub-X bullet engineered for controlled terminal performance at subsonic velocities
Recreational Enjoyment
Skill Development & Mastery
Hornady's Sub-X 190gr brass-cased subsonic round is positioned as a best-in-class, purpose-built option for suppressed 300 Blackout use thanks to its optimized bullet shape and tight manufacturing tolerances that deliver consistent subsonic velocities and reliable cycling. Compared with cheaper FMJ alternatives on this list it commands a premium but delivers measurable gains in terminal consistency and repeatable point-of-impact, making it a go-to for shooters who prioritize suppression performance and accuracy over raw round count.
Suppressor's best friend
Heavy 190gr stability
Tight groups
190-grain Sub-X bullet engineered for controlled terminal performance at subsonic velocities
Brass case, reloadable factory ammunition built by a reputable manufacturer
Suppressor's best friend
Heavy 190gr stability
Tight groups
190-grain Sub-X bullet engineered for controlled terminal performance at subsonic velocities
Brass case, reloadable factory ammunition built by a reputable manufacturer
$55-75 CAD
Sellier & Bellot 300 AAC Blackout 200gr FMJ Subsonic
Sellier & Bellot's 200gr brass-cased FMJ offers strong value as a market-leading economical subsonic round, combining dependable headstamp consistency with a lower price-per-round than the premium Hornady options. Technically it trades some long-range ballistic refinement for affordability and large-batch availability, so it appeals to volume shooters and training use while still providing brass reloadability that many cheaper steel-cased competitors lack.
Brass-case charm
Smooth cycling
Brass-case charm
Smooth cycling
Review Summary
"Sellier & Bellot 300 AAC Blackout 200gr FMJ Subsonic is frequently praised for its affordability and dependable function, though some reviewers report modest velocity spread and occasional consistency/QC concerns compared with premium brands. It’s seen as good value for range and practice use rather than match-grade performance."
Consistent subsonic
200-grain full metal jacket load optimized for subsonic 300 AAC Blackout velocities
Consistent subsonic
200-grain full metal jacket load optimized for subsonic 300 AAC Blackout velocities
Recreational Enjoyment
Time-Saving Convenience
Sellier & Bellot's 200gr brass-cased FMJ offers strong value as a market-leading economical subsonic round, combining dependable headstamp consistency with a lower price-per-round than the premium Hornady options. Technically it trades some long-range ballistic refinement for affordability and large-batch availability, so it appeals to volume shooters and training use while still providing brass reloadability that many cheaper steel-cased competitors lack.
Brass-case charm
Smooth cycling
Consistent subsonic
200-grain full metal jacket load optimized for subsonic 300 AAC Blackout velocities
Brass-cased commercial ammunition with consistent manufacturing standards
Brass-case charm
Smooth cycling
Consistent subsonic
200-grain full metal jacket load optimized for subsonic 300 AAC Blackout velocities
Brass-cased commercial ammunition with consistent manufacturing standards
$38-55 CAD
Aguila 300 Blackout 150gr FMJ Subsonic
Aguila's 150gr brass-cased FMJ is the budget-oriented entry in this set, notable for its lower recoil impulse and attractive per-round cost that make it well-suited to high-volume practice and informal range work. Compared with the heavier 200–220gr subsonic offerings it sacrifices retained mass and long-range energy but offers a financially efficient option for shooters who prioritize affordability and manageable recoil in suppressed rigs.
Pocket-rocket quiet
Budget-range ready
Pocket-rocket quiet
Budget-range ready
Review Summary
"Aguila 300 Blackout 150gr FMJ Subsonic is appreciated for low cost and availability, but many users report mixed accuracy and some variability in velocity; reviewers recommend it for casual plinking and training rather than precision or hunting. Reliability is generally acceptable but not standout."
Light recoil
150-grain FMJ variant loaded down to achieve subsonic muzzle velocities
Light recoil
150-grain FMJ variant loaded down to achieve subsonic muzzle velocities
Recreational Enjoyment
Time-Saving Convenience
Aguila's 150gr brass-cased FMJ is the budget-oriented entry in this set, notable for its lower recoil impulse and attractive per-round cost that make it well-suited to high-volume practice and informal range work. Compared with the heavier 200–220gr subsonic offerings it sacrifices retained mass and long-range energy but offers a financially efficient option for shooters who prioritize affordability and manageable recoil in suppressed rigs.
Pocket-rocket quiet
Budget-range ready
Light recoil
150-grain FMJ variant loaded down to achieve subsonic muzzle velocities
Brass case construction suitable for safe handling and potential reloading
Pocket-rocket quiet
Budget-range ready
Light recoil
150-grain FMJ variant loaded down to achieve subsonic muzzle velocities
Brass case construction suitable for safe handling and potential reloading
$30-45 CAD
Hornady BLACK 300 Blackout 208gr A-MAX Subsonic
Hornady BLACK's 208gr A-MAX brass-cased subsonic load occupies the premium precision niche on this list, featuring a match-oriented projectile and exceptionally consistent ballistics that outperform basic FMJ loads for target and competition suppressed work. It is costlier than the economy brands but provides a clear technical advantage in ballistic coefficient and shot-to-shot uniformity, making it the choice for shooters seeking top-tier subsonic accuracy.
Bullseyes nervous
Match-grade precision
Bullseyes nervous
Match-grade precision
Review Summary
"Hornady BLACK 300 Blackout 208gr A-MAX Subsonic earns high marks for exceptional accuracy, tight SDs, and premium consistency shot-to-shot, making it a favorite for precision suppressed shooting; the main criticisms are higher cost and more limited availability. Overall reviewers consider it a market-leading subsonic match round."
Long-range subsonic
208-grain A-MAX match-style projectile tailored for subsonic accuracy and stability
Long-range subsonic
208-grain A-MAX match-style projectile tailored for subsonic accuracy and stability
Skill Development & Mastery
Recreational Enjoyment
Time-Saving Convenience
Hornady BLACK's 208gr A-MAX brass-cased subsonic load occupies the premium precision niche on this list, featuring a match-oriented projectile and exceptionally consistent ballistics that outperform basic FMJ loads for target and competition suppressed work. It is costlier than the economy brands but provides a clear technical advantage in ballistic coefficient and shot-to-shot uniformity, making it the choice for shooters seeking top-tier subsonic accuracy.
Bullseyes nervous
Match-grade precision
Long-range subsonic
208-grain A-MAX match-style projectile tailored for subsonic accuracy and stability
Premium brass-cased, factory-match ammunition for consistent performance
Bullseyes nervous
Match-grade precision
Long-range subsonic
208-grain A-MAX match-style projectile tailored for subsonic accuracy and stability
Premium brass-cased, factory-match ammunition for consistent performance
$80-120 CAD
Federal American Eagle 300 Blackout 220gr OTM Subsonic
Federal American Eagle's 220gr OTM brass-cased subsonic load strikes a practical balance between precision and cost, delivering a heavy, stable projectile with good ballistic consistency and broad retail availability. Financially it sits between the low-cost imports and Hornady's premium lines, offering many shooters a middle-ground option that provides better terminal performance and accuracy than basic FMJ while remaining more affordable than specialty match-grade rounds.
Library-friendly thump
Wide availability
Library-friendly thump
Wide availability
Review Summary
"Federal American Eagle 300 Blackout 220gr OTM Subsonic is commonly praised for reliable function, consistent performance at subsonic velocities, and good value for training and target work; users note it’s an effective, affordable round though not purpose-built for expansion. It’s widely recommended for suppressed range use and general practice."
Consistent accuracy
220-grain projectile selected for stable, consistent subsonic velocities
Consistent accuracy
220-grain projectile selected for stable, consistent subsonic velocities
Recreational Enjoyment
Skill Development & Mastery
Federal American Eagle's 220gr OTM brass-cased subsonic load strikes a practical balance between precision and cost, delivering a heavy, stable projectile with good ballistic consistency and broad retail availability. Financially it sits between the low-cost imports and Hornady's premium lines, offering many shooters a middle-ground option that provides better terminal performance and accuracy than basic FMJ while remaining more affordable than specialty match-grade rounds.
Library-friendly thump
Wide availability
Consistent accuracy
220-grain projectile selected for stable, consistent subsonic velocities
Brass-cased, widely available ammunition from a major domestic manufacturer
Library-friendly thump
Wide availability
Consistent accuracy
220-grain projectile selected for stable, consistent subsonic velocities
Brass-cased, widely available ammunition from a major domestic manufacturer
$50-70 CAD