Just wanted to illustrate the 30 Herrett AR I am using for this precision challenge beside some other standard AR Calibers. In the center group are the 30's ranging from 110 gns up to a cast 165. The rimmed cartridge is the original 30 Herrett that I shoot from my Thompson Contender Super 14 and is the origin of the 30 HRA.
The line up consists of a Serria 110 (most recent target), Hornady 110, Hornady 110 (first target), , Nosler 125, Barnes 130, Hornady 150, Speer 180 and the cast 165 gn.
The first is the 5.56 next to the 6.8 SPC, which is the parent case for the 30 HRA. As you can see that with a 30 deg shoulder it has more case capacity over the two 7.62's and that are next to the big boy 308. This added capacity increases the performance over the standard 7.62 x 39.
This is very potent cartridge in an AR sized platform.
The line up consists of a Serria 110 (most recent target), Hornady 110, Hornady 110 (first target), , Nosler 125, Barnes 130, Hornady 150, Speer 180 and the cast 165 gn.
The first is the 5.56 next to the 6.8 SPC, which is the parent case for the 30 HRA. As you can see that with a 30 deg shoulder it has more case capacity over the two 7.62's and that are next to the big boy 308. This added capacity increases the performance over the standard 7.62 x 39.
This is very potent cartridge in an AR sized platform.
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