Guys looking for load and component infor on the 77gr Mk 262 Mod 1 5.56 round.

I need the actual spec if it is available, a link would be cool.

Here I what I know

Projo : 77gr Sierra OTM round with cannelure

Powder : ?

Primer : CCI military ?

Brass : Black Hills or ?


Also source for components would be great. Thanks