From Accurate shooter link:
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There will be six (6) new TMK bullets, two in .224 caliber, and four in .308 caliber. The six new tipped bullet types should be available in �early 2015″. Sorry, Sierra will not be offering 6mm, 6.5mm, or 7mm TMKs for the time being, although Sierra will introduce more TMK varieties in the future. Currently, Sierra is focusing on �the most popular calibers�. Notably, the new 22-Cal 77gr TMK has a 0.420 BC � identical to the BC of Sierra�s 80gr non-tipped HPBT MatchKing. So, you get the BC of a heavier bullet in a lighter projectile that can be pushed faster. That�s big news for .223 Rem and 22-250 shooters.



Bullet Name (Click for ballistic coefficients)

Brand

Item

BC (G1)





.224 dia. 69 gr. Tipped MatchKing (TMK)

Tipped MatchKing

7169

.375 @ 2700+ fps





.224 dia. 77 gr. Tipped MatchKing (TMK)

Tipped MatchKing

7177

.420 @ 2400+ fps

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I am wondering if the 77grainers will fit in magazines and feed nice.






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