.22 Caliber (.224) 77 gr. HPBT MatchKing

Sierra MatchKing BulletsDesigned for Service Rifle competition in the M16A2/AR-15A2, our 22 caliber bullets have set an incredible number of new national records.  The 77 grain #9377 MatchKing® allows seating to an OAL that permits cartridges to be loaded into M16/AR15 magazines.

While they are recognized around the world for record-setting accuracy, MatchKing® and Tipped MatchKing® bullets are not recommended for most hunting applications.  Although MatchKing® and Tipped MatchKing® bullets are commonly used for varmint hunting, their design will not provide the same reliable explosive expansion at equivalent velocities in varmints compared to their lightly jacketed Hornet, Blitz or Varminter counterparts.

The #9377 bullet is available in a cannelured version in box sizes of 500 (#9377G) or 50 (#9377GT).  This bullet is also available moly-coated (#9377M).

This bullet requires a barrel twist rate of 1x8” or faster.

Dia. (inches) Weight (grains) Sectional Density Ballistic Coefficients and Velocity Ranges
0.224 77 .219 .372 @ 3000 fps and above
.362 between 2500 and 3000 fps
.362 between 1700 and 2500 fps
.343 @ 1700 fps and below

Price: $165.46
Stock Code: 9377
500 bullets
To order by phone, please call 1-888-223-3006

Related Products

Price: $17.51
Stock Code: 9377T
50 bullets

Price: $21.47
Stock Code: 9377GT
Cannelured 50 bullets

Price: $181.69
Stock Code: 9377G
Cannelured box of 500
*Sierra Bullets does not sell any loaded ammunition. What you are purchasing are bullets only and will need to be loaded into ammunition in order to be fired from a firearm. Prices, specifications and availability are subject to change without notice. We reserve the right to correct typographic, photographic and/or descriptive errors.


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Tom B of Pullman , Washington November 16, 2017
Can’t find a ballistics chart for average rate of drop. Good bullets though
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Jon T of Kenai, Alaska August 7, 2015
works great. At 300 yards prone it will outshoot the 80 grain, which is a really good bullets too.
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Rich L of Punta Gord, Florida December 11, 2014
I have 2 LMT Defenders 2000 carbines and 2 Bushmasters. A rifle and a carbine. In each AR the 77gr SMK is the most accurate. All 4 AR`S shot the 77gr SMK tighter than the Hornady 75gr BTHP. Also my bushmaster have a 1/9 twist and the LMT carbines have the 1/7twist. Just because you have a 1/9 twist don't mean your barrel won't handle the 77gr SMK. Go test 10 yards at 100 yards and see. you might be surprised. Sure there are some 1-9 twist won't group the longer bullets tight.
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Joseph J of Waukegan, Illinois September 6, 2013
NRA Highmaster Distinguished Rifle Badge 3-time Police Rifle Trophy @ Camp Perry What else is there to say... Performance Rules!!
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Gregory V of Freeburg, Illinois August 16, 2013
Definitely my go to bullet for the 5.56. Accurate and effective.
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