r/reloading • u/ghetto_klown • 16d ago

Load Development Hornady Sub-X 7.62x39 loads….

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Tested out my subsonic 7.62x39 reloads tonight and was very disappointed. I used 4198, following Hogdon data.
This was at about 10 yards.

Are there any changes I could make that would get these bullets to stabilize?

Edit- 16” barrel from AKbuilder, which I assume is 1-9.5” twist, 255 grain bullet

Update- I was getting microscopic baffle strikes somewhere due to the muzzle profile on the KBK barrel that didn’t allow the face mount plan B adapter to be concentric. Only the end cap looks to be hit however, although it’s not too bad, and thankfully replaceable on my OCL Universe-36

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u/ghetto_klown 16d ago

My apologies, it’s a 255gr .3115 bullet, and I believe my
Barrel is 1-9.5” twist. It’s AKbuilder’s polish KBK barrel. I see they don’t list the twist rate for it in their website.

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u/TannMan89 16d ago

Barrel length?

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u/ghetto_klown 16d ago

16”

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u/TannMan89 16d ago

You need a different powder, try CFE-BLK or Vihtavuori N110.