Gorilla Ammunition .223 Rem 77gr. Sierra MatchKing© – 20 Round Box


(9 customer reviews)
Locations we cannot ship to: HI, AK, MA, WASHINGTON DC, IL Cities: Bensenville, Chicago, Chicago Heights, Cicero, Evanston, Norride, Orlando Park, Schaumburg, Thornton, IL County: Cook County, Maryland Cities: Annapolis, Friendship Heights, Takoma Park NY Cities: New York City, Buffalo, Rochester. We are able to ship to the rest of New York through FFL, CA: Ship to FFL ONLY, RI: Beginning January 1, 2023, a person may only purchase ammunition if they are 21 years or older and have a valid pistol/revolver safety certificate or a Rhode Island hunter education course card issued by the Department of Environmental Management.

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223 Remington, 77gr Sierra MatchKing© – 20 round box

Gorilla Ammunition utilizes only the highest quality components to manufacture top quality match grade loads and this round, chambered in 223 Remington with the 77gr Sierra MatchKing, is no exception   Factory new cases, match grade primers and top quality projectiles make this load the go-to choice for competition. Component selection is only the start to our top quality ammunition. The Gorilla Ammunition manufacturing process ensures consistency by pairing high end linear loading equipment with multi stage in-process inspections by highly trained machine operators with a final inspection of each and every round by our quality inspectors to ensure only ammunition that meets our rigorous specifications makes it into the box.

Technical Specifications

  • Caliber: 223 Remington
  • Projectile: 77gr Sierra MatchKing
  • Muzzle Velocity: 2540 FPS
  • Muzzle Energy: 1102 ft/lbs

Click here to browse our selection of .223 / 5.56 Ammo.

Small Arms Ammunition purchasing disclaimer: You must be 21 or older to purchase rifle ammunition. All ammunition is shipped via UPS ground. Always ensure you use the correct ammunition in a firearm in good working condition. It is the responsibility of the consumer to know and comply with State & local laws regarding the purchase and possession of ammunition. Please check your local laws before purchasing.

Additional information

Weight 0.6 lbs

9 reviews for Gorilla Ammunition .223 Rem 77gr. Sierra MatchKing© – 20 Round Box

  1. Michael Goins (verified owner)

    Most consistent ammo I’ve shot thru my rifle

  2. ME (verified owner)

    Accurate and reliable. Definitely a great product if you are looking to get quality ammo with better accuracy.

  3. Ed Herter

    My son bought me a box of this without knowing what I shoot. I said thanks and what am I going to do with this. I reload everything I shoot and had no .223 except a AR platform. Being a FFL and a Remington fan I was able to get for my wife one of the last rifles out of the plant before it closed doors. It is a 783 Varmint. See already has a 788 in .222 that is a absolute killer. Well, I put a Bushnell Engage scope on it and it just sat.
    We were getting ready for a 200 yard turkey shoot and I went to sight in her 223 (I shoot a old 308 Sendero). I used my 223 Ar loads to get on paper and then go to 200 yards. Let’s log a basketball. I then sighted in the Gorilla ammo at 200 yards and gave the rifle to my wife. She shot numerous group of nickle size at 200 yards. Wow.
    Now I am looking for it as for me to develop as a accurate a load by the shoot I will be pressed for time. This is the only ammo that I have ever shot out of any of my rifles that i am impressed with the accuracy.
    Mortomer, turn the machines on!

  4. Matt (verified owner)

    Great service and quick shipping, love the way the ammo is packaged in the clamshell/box. I wanted a ammunition that would give me an idea of how accurate my newest build was….. Needles to say, Faxon 14.5″ flame fluted .223 Wylde turned out .75″ 5 shot groups at 100 yds with Gorillas 77grn. Great ammo and will definitely be buying more.

  5. Matthew Seymour (verified owner)

    Great ammo, shooting .9-1″ 100yrd groups out of my Faxon 14.5″ barrel with an Eotech. Functions great, zero issues. Will definitely buy again.

  6. Andrew Comer (verified owner)

    Gorilla Ammunition has the best service in the business! Fast shipping, great packaging and prompt response to emails.

    Their ammo is awesome too! Consistent and accurate. Can’t ask for anything more.

    Thanks guys!

  7. Kyle M

    I shot the 77 GR .223 REM out of my Ballistic Advantage 18 inch 1:7 twist chambered in 5.56 NATO at 100 yards, I shot a 5 round group giving me a .75 MOA. To compare I typically shoot the 5.56 black hills 77 GR TMK and shot a 10 round group achieving a 1 MOA at 100 yards. That being said I am very pleased with their product and given the price and the performance, also the availability I might make this my ZERO load.

  8. Seth Miles

    Out of a 16″ Seekins Precision 1:8 twist .223 Wylde barrel. It keeps .25 moa at 100 yds. I’ve reached out to 500 yds with it so far. Superb ammunition!

  9. shane.richardson326 (verified owner)

    This is my second time purchasing this ammo to run in my 18” 1:8 Proof Research barreled AR. While the ammo itself is top notch, yielding sub-MOA accuracy out to 600 yards, it was Gorilla’s customer service that prompted me to come back and write a review. They emailed out a 20% off code while part of their team was out at SHOT Show, so I took them up on a great deal, thinking it would take a week or more to ship. Nope! They had it out the door headed my way the very next day! Well done guys, keep up the good work, and we’ll keep coming back for sure!

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