I need help working on a load for a 20" AR 223. I have a 7 twist kreiger barrel with a Wylde chamber. Due to the component shortage right now I want to use what I have on the shelf. 77gr smk's, lake City brass, Remington 7-1/2 or federal gold medal match primers, and varget or h4895. Loads have to be mag length. This will be used for the 200 and 300 yard stages in high-power.
Please provide input on what powder powder you would try out first, charge weight, neck tension, etc.
Jon,
Old Service Rifle Governors 10, Distinguished and 13c years at Camp Perry. ( think I shot a lot ).
AR 20" Barrel ( I never found 77gr. Sierra or Nosler my go to). Hornady 75 my heart beat.
Brass LC (2018 much lighter than older years). Primers Wolf SRM , Federal AR , 205M ,Old White Box Winchester .
Never got the Remington 7 1/2 Bug.
Powder R-15 or N-140 Same? 24.0 to 24.5 grs.
I have a White Oak 24" Optic Barrel Testing right now.
LC 2018 Brass (prepped and weight sorted ). Wolf SRM , World Powder S062 24.1 gr. 75 gr. Hornady Mag length.
It will clean a 600yard F-Class Target at 485 yards. ( back yard range ).
I find S062 to be great for AR's.
The same load with 80gr. Nosler will clean that 600 target at 600yards today 150-11 and 149-8 on a ShotMarker.
If you go back in time ! The Wisconsin Jr. Team set Camp Perry on Fire using 75 gr. Hornady Bullets !
We found shooting them on the Runt Target (300 reduced ). 75's at .020 off shot better than 80's .
Best of Luck