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Questions & Answers
Is this ammo ok to use on a 5.56 1/8 twist 16inch barrel?

I can't see any logical reason why you couldn't but consider the fact that these were made with the intention of being fired out of a SBR ranging from 7.5-12.5 at the max so performance and reliability may vary. You'd be better off exploring the hundreds of other loads from Hornady or other manufactures that are comparable in price and have far better performance your specific twist and barrel length.

by K2, Verified Owner, March 30, 2025
Customer Reviews
Helpful Positive Review Premium projectile and powder load for your SBR by Lone Ranger, October 28, 2023
This stuff was a game changer for my suppressed MK18. Really clean low flash powder properly charged to match an SB AR. Hard hitting, accurate at SBR distances and lends itself to a suppressed platform nicely. Minimal fouling, nearly zero flash which...
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2/2 found this helpful
Helpful Positive Review hornady black 75 gr SBR by Erik, Verified Owner, October 1, 2024
Works great in my AR pistol w/ Surefire RC2! Cleaner with a little less gas noticeable in my 10.5” barrel.
1/1 found this helpful
Helpful Positive Review Click, Bang! by A, Verified Owner, October 31, 2023
Great ammo. POI is the same, more or less, as M855 out to 150 yards from a BCM 14.5” upper. Wish it was not so expensive but you get what you pay for.
1/1 found this helpful
Helpful Positive Review Best Performance in SBRs by Target7.62, Verified Owner, March 4, 2024
I get much better accuracy with this ammo in my 7.5 and 10.5 inch barrels that with the 55 grain FMJ. I tried some rounds into wet newspaper and it really expands. I'm using this as my go to self defense round from now on. Surprisingly it's no louder...
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2/2 found this helpful
Helpful Positive Review Great Price & Fast Shipping by Redneck Flip, Verified Owner, October 26, 2023
These were in stock and were on sale. I used a current coupon and saved even more. It only took 5 days to get my order, after placing it and that's to the West Coast. These rounds are great for my shorter AR's. The flash is minimal and group well ...
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2/2 found this helpful
Most Recent Reviews nice looking ammo by jd, Verified Owner, June 7, 2025
If the shoot and work as good as the look they will be awesome
Read All 19 Reviews

A 15% off TREAT with SPOOKY Savings from Hornady!

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Eligible models will have a savings offer and the coupon code to use below. Add the item to your cart and enter coupon code for savings on that select model! Limited time only. Cannot be combined with other promotions or offers.
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Please note: For safety reasons, OpticsPlanet is not able to accept returns of ammunition for any reason, and no refunds will be issued for any returned ammunition.

Product Info for Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition

5.56 Nato 75 gr InterLock HD SBR Black is designed specifically for 10.5"-11.5" SBR?s by using proprietary propellant technology and a bullet designed with technology from industry leading Critical Duty FlexLock bullets. This round provides exceptional ammunition performance in SBR?s suppressed or unsuppressed with virtually no flash or residue dramatically reduced sound signature will not foul or overheat suppressors uniform velocity and accuracy and provides controllable rate of fire in automatic platforms. Designed to meet the requirements of the FBI protocol this round is the optimum choice for 10.5"-11.5" barreled 5.56 rifles.image

Buy Hornady ammo to get bullets that are accurate, consistent, and always dependable.

WARNING: California`s Proposition 65

Specifications for Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition:

Manufacturer: Hornady
Caliber: 5.56x45mm NATO
Bullet Type: Spitzer Flat Base
Bullet Weight: 75 grain
Cartridge Case Material: Brass
Muzzle Velocity: 2310 ft/s
Muzzle Energy: 897 ft-lbs
Application: Medium Game, Self-Defense
Package Type: Box
Primer Style: Centerfire
Sectional Density: 0.214
G1 Ballistic Coefficient: 0.23

Features of Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition:

  • High-Quality Cases, Primers Propellant
  • Versatile Hornady bullet options
  • Optimized performance from various platforms

Package Contents:

  • Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition

Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition Orderable Models

List of Orderable Models

Hornady BLACK 5.56x45mm NATO 75 grain InterLock HD SBR Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81296 , MPN: 81296 , UPC: 090255812961 , Code: 0H-LAR-81296
Hornady BLACK 5.56x45mm NATO 75 grain InterLock HD SBR Brass Cased Centerfire Rifle Ammo , MPN: 81296-KIT1 , Code: 0H-LAR-81296-81296-KIT1
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