IMR 8208 and 5.56

[Alaska]

Has anyone used IMR 8208 with 77gr MK in the 5.56 AR?

 

[Dwh7271]

I have not.
Used it with 55 gr and it was terrific. Don't have my book with me but I think it was around 25.4 gr or so.

 

[greenheadcaller]

Not exactly, but I do use it (XBR) with 77 gr nosler custom comps

link from when I was developing

viewtopic.php?f=4&t=28315

 

[Alaska]

Well just back from range.......23.3 gave me 2686 FPS excellent accuracy

With 77 MK
LC Brass
CCI 41 primers
IMR 8208
Mild crimp with lee factory crimp die
2.250"

BINGO
I need 2700 to 2750 FPS in 18" MK 12
Found it @ 23.8 for 2748 FPS