That's the impression I get. So why aren't the barrel makers on the top half of the world getting this right? At some point, they had to make tools or upgrade them. Seems like a good time to switch over or at least add the option.
Loc: Wolfe City, TX
How's it going to work against coriolis. If shooting south to north you're looking at a target that is moving to the right. If you're shooting north to south you're looking at a target that is moving to the left. West to east, target is moving away, east to west, target moving closer. I don't even figure it in shooting a mile, I think the wind is a bigger factor to be concerned with.
Spin drift? One time has it ever come into play for me. Zero wind, 178 gr out of a .308, 800, 900, 1000 yards, watched the bullet drift right of the target at 800, with a solid zero and not a leaf flickering. Rare conditions.
Just my opinion.
I did hear a tale of a LH twist barrel that was RH threaded into the action. The barrel unscrewed itself from the action. Not totally, but did daylight barrel to action.
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JG, go into your ballistics ap. Run the numbers on a load to a thousand yards, with no wind. The drift shown is your spin drift, right? Now edit the firearm to have a left twist, and run the same load with no wind. What does your spin drift show now?