So I was reading on a box of black hills ammo and it was saying that the heavier bullets needed a faster twist rate to be accurate. That got me thinking what’s the twist on my DMR AR? I bought the barrel off I think brownells years ago and apparently they have stopped selling them it is a 24” extra heavy bull barrel with what I thought was a 1:12 twist but I really don’t know and wasn’t thinking about twist rate much when I built it.
Anyway dumb story short it’s got me thinking how can I find the twist rate of my barrel?
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