@Hiawatha
Why would you pick the 7.62x39 over the blackout? I thought their supersonic ballistic performance was pretty similar?
The Howa 300 blackout is 1:7 twist from what I have read so I thought that would be fine for 120ish grain supersonics out of something like a 12" barrel? or are you meaning the twist rate in the 7.62x39 is an issue?
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