I've always had the impression that foreign SS109 loads were more accurate than the US M855 version. I finally decided to test this out to see if it held true (for my rifle).
The first test will be with ADI F1, GGG (Lithuanian) and IMI M855 (2009)
I will be using Molon's format (for the most part) with 10 round groups and no called fliers
The GunSteyr AUG-A1
20" barrel; 1:9 twist
1.5x optic
front sandbag rest
Control Load
ADI 69gr SMK
ADI F1
The Groups:
2.124" ES/0.776" mean radius
2.714" ES/0.764" mean radius
2.843" ES/0.679" mean radius
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Avg Group ES: 2.560"
Avg Mean Radius: 0.740"
Best group (MR):
GGG (Lithuania)
The Groups:
2.607" ES/0.703" Mean Radius (I absolutely flubbed 2 shots that would have halved the group)
1.881" ES/0.758" Mean Radius
2.277" ES/0.646" Mean Radius
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Avg Group ES: 2.255"
Avg Mean Radius: 0.702"
Best Group (MR):
IMI M855 (2009)
The Groups:
3.782" ES/1.102" Mean Radius
4.080" ES/1.089" Mean Radius
3.496" ES/1.038" Mean Radius
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Avg Group ES: 3.786"
Avg Mean Radius: 1.076"
Best Group (MR)
The take home for me is that Israel hates Austria
Hertenberger SS109
The Groups:
2.098" ES/0.751" Mean Radius
2.471" ES/0.741" Mean Radius
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Avg Group ES: 2.2845"
Avg Mean Radius: 0.746"
Best Group (MR):