Recently I purchased a few boxes of CORE Rifle Systems new CORE Ordnance Ammo at the Company Headquarters Retail Store in Ocala, FL. Two of the boxes were .223 Sierra Match King in 77 grain and one box of 300 BLK OUT. As an experienced re-loader, over my 15 years of doing so, I reload to increase my accuracy and to save money. After breaking down these rounds and fully inspecting all the parts, I was thoroughly impressed with this ammo. It shoots on par or better than my 77-grain hand loads in which I painstakingly measure and hold to the tightest tolerances I possibly can.

The results of all the groups tested came in at .50 to .75 MOA, including one group of ten rounds tearing a ragged hole. My best hand loads for this round average just about the same coming in at .50 MOA. My test rifle was a Rock River NM with a Magpul PRS stock, a CORE 15 Keymod 15” rail. My optic of choice was a Leupold MK 6 AR 6x18 scope. Further testing on the chronograph, the CORE Ordnance averaged 2785 FPS with a standard deviation of 24.0 FPS. My own hand loads averaged 2754 FPS (31 FPS) slower with a very good standard deviation difference of 9.4 FPS. Even with the standard deviation difference, the CORE Ordnance grouped just as well as the hand loads.

After seeing the great results, I decided to break down several of the CORE Ordnance rounds to check their tolerances. I broke this down into 4 categories

  1. Powder Charge
  2. Weight
  3. Brass trimmed to length
  4. Overall length (measured from cartridge base to the bullet Ogive.

I measured three rounds from each box of the 77 grain Sierra Match King’s. I then pulled the projectiles and measured the powder charge and the brass.

These are my results are listed here as well.

What I found are some of the tightest tolerances I have seen from factory ammunition, especially ammo not marketed as match ammo. The difference in the powder charges explains the standard deviation of 24 FPS in the chronograph testing. After seeing this, I tested the remainder of the rounds. I purchased an additional box of ammo and headed to the local 1000 range. After obtaining zero at 100 yards, I shot the CORE Ordnance in 100 yard increments out to 825 yards. All rounds impacted my steel target with first round hits up till 825 yards. There it took 3 rounds to hit the steel due to a ¾ MIL of wind from the right to left wind. The ammo proved to be incredibly accurate holding sub MOA out past the 600 yard target. Five rounds fired at the 600 yard target produced a five inch group. It wasn’t until the 825 yard range before I noticed the groups opening up. Even at that range, the 77 grain .223 ammo was barely over standard MOA.

I would highly recommend this ammo and any other choices offered by CORE Ordnance. It has proven itself a place on my list of highly accurate and reliable ammunitions. A definite player in the accuracy market of match ammunitions.

~ Charles Caley –Former US Army SFC


"Okay, enough of the positive reviews on this Core 15. As a Colt armorer and an LEO who carries an AR as my primary weapon, there is NO way this rifle can match my dancing pony roll marked babies.

I ordered a Core15 last week and it arrived today. After cleaning it (man this rifle fits together tighter than my Colts), I bolted on an Aimpoint and some irons and headed to the range.
As tight as this thing fits, there's no way it will cycle! Darn, it ate 100 rounds of 55 grain duty ammo, milsurp, and reloads. With my Colt's I usually can induce a jam by leaning on the mag. No go on the Core 15, I couldn't find a way to jam the darn thing.

Okay, I KNOW my Colt's are more accurate than such an affordable rifle. Hmmmm, it's grouping as good as the Colt, maybe a little better...wish my Colt's trigger was as smooth as the Core 15.
Obviously, this range review is not going the way I intended it. I wonder if I can get a pony sticker to paste over the Core logo?
I'll check back later...this thing is fun to shoot. I'm heading back to the range with my Core 15!"

-AR15.com Member (Code_3)


"TAC III SBR continues to shoot well. Continue my thanks (armorer agrees) for your prompt and quality warranty service (unlike Remington). Added a Bushnell TRS-25 red dot, and am nearly zeroed (weather limited today's shoot). Will shoot the CORE carbine DI and piston ARs tomorrow if possible: they still have no issues whatsoever after over a year. Thanks to CORE for quality guns and service. I continue to recommend CORE"



"Dear core 15 just received the 300 blackout upper order 12488 it is one fine piece of equipment it looks so good cant hardly weight to shoot it, thank you for the core melt down deal it was exciting and fun to participate in. I will tell all my friends of the great products you all have. it truly completed the combo that i already have. three calibers for one receiver that's amazing thank you again and keep up the great job. just awesome"



"I bought 1 of your Core 15 rifles about 8 months ago model 6408 I love it, runs like a dream, accurate and absolutely no issues, have probably 4000 + rounds down range with it. I've convinced several of my combat operators buddies to look into and some have purchased them. Looking into replacing my BCG with your CORE15® Nickel Boron BCG, any deals with price? Have found several with 129.00-159.00. Not sure about purchase of them although reviews are mixed, want to keep mine with Core 15 parts. thanks so much keep up the good work"



"I have enjoyed your rifle. I have a Core 15 m4 and love it. The rifle I got had some issues but Justin and your crew took very good care of me. I haven't had one issue sence. The Core15 m4 will eat whatever ammo you put in it, as a good rifle should. Keep up the good work!"



"First and foremost.. I love your products. 7 months ago I purchased an M4 scout.1000+ rounds later I'm impressed, form fit and function have been flawless. My fiancee has adopted the scout. Not with intention I have expounded the excellence of your company and products. Ar-15 goa pages have been my platform, the membership have embraced my opinions. I hope I have helped place you as the best weapon value in the AR market. I have proven the excellence of Core15 v/s the likes of Colt, LWRC and Daniel defense. Groupings don't lie. It has been my honor to try to help my brothers at arms. I will be in the market again for another scout soon, hopefully if will be a short wait, I will only buy from my local supplier, he i s also a vet and is awaiting conformation on lead time. I hope all is good for you and the staff.

You have earned my respect and commitment. Semper-Fi, Whiskey6Alpha going ghost"



"I recently purchased a Core m4 .223 from Sportsman's Warehouse in Logan, Utah. I am writing to tell you how impressed I am with the quality and workmanship of this firearms system. I am a Retired Police Officer and have had the opportunity to fire about every brand of M4 rifle on the market, all of which were priced higher than yours. I found it to be equal or superior in all aspects. I will be recommending your line of rifles to the students in my firearms class here in Logan. Keep up the Good Work!"



"My armorer showed me how to re-install the MI hand guard that came off while shooting (only tightening needed). SBR TAC III continues to SHOOT without problems. Thanks to CORE for standing behind your gun and doing so promptly. The piston and DI CORE carbines continue to shoot with no issues whatsoever after 1-1/2 years and closing in on 1,000 rds.. Remington R51 is now 7 weeks and say they don't know when the gun will be returned, that the R51 is (quote) "a work in progress"! BIG difference in companies. I continue to recommend CORE every chance I get."


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