New Sierra MatchKing Bullets in 243 Caliber, 6mm

“The Bulletsmiths” from Sierra seem to have a new 243 caliber (6 mm) bullet incoming.

Someone, most likely an avid reloader, noticed that Midway USA were listing the new bullet as “in stock soon”.

You can find the link here.

Sierra MatchKing Bullets 243 Caliber, 6mm (243 Diameter) 110 Grain Hollow Point Boat Tail.

What makes this bullet special is its low drag, Sierra claim a G1 Ballistic Coefficient (BC) of 0.617.

There’s no information about G7 BC yet.

Below: high speed, low drag


The facts below are according to Midway.

Diameter 0.243 Inches
Quantity 500 Bullet
Grain Weight 110 Grains
Bullet Style Jacketed Hollow Point Boat Tail
Lead Free No
Ballistic Coefficient 0.617
Cannelure No
Bullet Coating Non-Coated
Bullet Caliber 6mm, 243 Caliber
Sectional Density 0.266
Recommended Twist Rate   1 in 7″ or Faster


Prices from Midway are as follows:

I’m sure the prices will be forgotten once you get the satisfaction of hitting your target…
One difficulty will be to find a “fast” barrel that can stabilize this bullet, the recommended twist rate of 1 in 7″ or faster might not be too common.
If the Ruger Precision Rifle can stabilize it, I guess it will be a popular bullet very soon. RPR’s twist rate is 1 in 7,7″, but the 243 was only available in version 1 which is now discontinued and recently removed from Ruger’s homepage.
Some of Sierra’s other HPBT Matchkings in 6 mm.

You can find more information over at

Eric B

Ex-Arctic Ranger. Competitive practical shooter and hunter with an European focus. Always ready to increase my collection of modern semi-automatic firearms, optics and sound suppressors. Owning the night would be nice too.


  • Blake

    Potentially very promising, if it’ll fit in the magazine…

  • JumpIf NotZero

    I do enjoy that .243 was around FOREVER… then competition people moved to 30cal, then 7mm, then 6.5, and now back to 6mm.

  • User

    High velocity 6mm is better than all those stinking mid velocity overpraised 6.5mm.
    Necked down 6.5 cartridges to 6mm have better performance~ Also as a side effect the Ogive is longer in comperasion to the caliber (form factor), without exeeding OAL of the cartridge and action.