I have noticed that when I am developing loads using the OCW methodology, that my accuracy nodes line up well with many of the GRTs OBT predictions and the resulting dispersion is generally just under 1/2 MOA (limited by my shooting ability). However, on the antinodes, I see up to (sometimes) 3 MOA of dispersion. I was curious; what are you guys seeing as a maximum amount of dispersion on your accuracy antinodes using your bolt action rifles?
- Thread starter poi78
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- accuracy antinode dispersion
Dispersion in my tests usually is under 1 MOA for 3 shots of any given charge weight.
I would say if a rifle doesn't hold sub MOA for the entire test, any shift in POI would be hard to detect.
Heavy barrel profile in .338 Lapua. The barrel length is 24”. I’m using Norma brass with H4350 pushing 185 grain CXs at the spec COAL. When I come out of a node, the dispersion really opens up. Not sure exactly why this is occurring. I’m shooting off a front bipod with a rear bag.
Agreed. I have been using the dispersion size to judge accuracy nodes with (best that I can), shifts in group centroids to try to inform node stability.
I don't have experience with the 338 LM, but I had a 29" #1 contour in 30-06 that I eventually put between 2 trees and pulled. My blood pressure went back to normal after that.
. Been there before with a 5 iron on the 4th hole pond. It took a permanent bath.
