powder loads to replicate C77/M855 and GP90 5.56 ammo ??

P

prairieguy

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Hello All.

I'm looking for some reloading advice. I bought a pile of the 62 gr ss109 bullets from Canuck223 a while back. Now I want to use them in handloads for service rifle matches. I'll be using a Sig Classic green with iron sights and a 1/10" twist and an AR topped with an ELCAN and a 1/7" twist .

I'm hoping to find two loadings which will get me as close to spec as possible with the GP90 for the Sig and C77/M855 for the AR.

Does anyone have any powder/primer load data which meets what I am looking for and they are willing to share?

Les
 
The last load I used in my 20 inch Bushmaster was

SS-109's
25.8 Gr H-335
Winchester SR
Winchester commercial cases trimmed to 1.750

Bullets seated and lightly crimped at the rear edge of the cannelure.

Embarrasing thing is I can't for the life of me remember the velocity?!
 
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