So I have an extremely accurate load for my AR using H322 powder. Unfortunately, this powder is hard to come by right now, so I'm developing a load using Varget. I was expecting a vertical shift in POI due to the change in powder, but do not understand why my POI shifted 2 inches to the right. Other than the powder change and amount of powder, all other reloading techniques were the same. Does anyone have an idea on what is causing this shift to the right?
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Shift to the right
- Thread starter Brownsfan
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memtb
Well-Known Member
Just a SWAG…… barrel harmonics. I don't think that they have to be vertical only! memtb
Last edited:
Black Hat
Well-Known Member
If you can eliminate environmental factors, a powder change can definitely move your POI.
A powder burn rate change will change the harmonics of the barrel, is what I believe to be the biggest factor in POI shift.
I've seen this tuned out with a barrel tuner before.
Just wind it over and shoot if it groups!
A powder burn rate change will change the harmonics of the barrel, is what I believe to be the biggest factor in POI shift.
I've seen this tuned out with a barrel tuner before.
Just wind it over and shoot if it groups!
