Sierra 77gr. Hi-Power Loading

[relictrader]

LOOKING FOR AR 77gr Sierra 223 LOADS FOR HI-POWER Matches.

Can some one help with tips....THANKS

 

[memilanuk]

24gr +/- of RE-15, Varget, or N140. Might want a little more, maybe a little less, depending on your gun.

You may want to check out nationalmatch.us... thats *all* they do over there - NRA Across The Course match shooting.

 

[JZ1each]

23.5 grains of ramshot TAC and remington 7.5 primer should do just fine.

 

[M21SNIPER]

relictrader,

Sierra Infinity Suite software lists max load for VARGET,the powder I also use) as 23.9 grains for a listed velocity of 2550 f.p.s. This was obtained with a Federal case, and Rem. 7 1/2 primers in a Colt HBAR AR rifle. OAL=2.260

My match load was something I got from a Dist. Rifleman/President's Hundred/High Master:

Winchester Cases, CCI BR-4 primer, 23.5 gr. VARGET for 77 gr. SMK-HP loaded out as far as she'll go,2.260) or 0.015 off of the inside of the 20 round magazine.

In case you need a match load for 600 prone-slow fire, use the same powder charge,or a little more since your OAL is much longer when shooting single shot = +/- 2.450" OAL-as close to the lands as you can get them, i.e. the bullet will be farther from the heavier powder charge so you get less pressure)

I have seen 24.5 grains of VARGET shoot very accurately with no pressure signs in heavy barreled match grade service rifles AR-15's. Use common sense: back off of the maximum load by 0.5-1.0 grain and slowly work up from there. MAX. LOAD as listed for 80 grain bullets in service rifles is 24.0 grains of VARGET for 2600 f.p.s.

Good luck and get them in the 10 ring!

Regards,

Matt