Sierra Bullets Releases the .224 – 77 Grain TMK Bullet for Reloaders as a component
Sierra Bullets has announced the release of their .224 caliber 77 grain Tipped Matchking (TMK) bullet, along with a 69 grain Tipped Matchking bullet as components for reloaders. As we posted last month, Will, from AR15 Hunter, had great results at the range while shooting the Blackhills loaded 5.56 ammunition that uses the Sierra 77 grain TMK. He will be heading out again at the end of this month to use it on whitetail deer. Sierra states a requirement of a 1×7″ or a 1×8″ twist barrel for the 77 grain bullets and a twist rate “not slower than 1×10″ for the 69 grain bullets.
The following specifications are listed for each bullet:
69 grain – .224dia. – .196 sectional density
Ballistic Coefficients and Velocity Ranges:375 @ 2700 fps and above
.365 between 2700 & 1950 fps
.335 between 1950 & 1700 fps
.305 @ 1700 fps and below
77 grain – .224 – .219 sectional density
Ballistic Coefficients and Velocity Ranges:
.420 @ 2400 fps and above
.415 between 2400 and 2000 fps
.395 between 2000 and 1750 fps
.380 @ 1750 fps and below
Here is the information posted on their site:
Sierra has enhanced a segment of the MatchKing line by adding the acetal resin tip, thus crowning the Tipped MatchKing (TMK) bullet line. The major advantage of adding a tip to the bullet is the reduction of drag, producing a more favorable ballistic coefficient. Another benefit is reliable feeding in magazine fed firearms. The 77 grain Tipped MatchKing (TMK) allows seating to an OAL that permits cartridges to be loaded into M16/AR15 magazines.
Although the MatchKing line is recognized around the world for record setting accuracy, like their untipped counterparts, Tipped MatchKing (TMK) bullets are not recommended for hunting anything larger than varmints. Having heavier jackets than our Hornet or Blitz line of bullets, these bullets will not provide the same explosive expansion on small varmints.
We look forward to the release of this excellent bullet and will have future reports on their performance.