Originally Posted by
pointblank4445
It's been a while since I've had a barrel this apparently responsive to heat and that was a Remington bolt action and even then barrel mirage would require you to let off for a bit and let the gun cool if we were say in a school and allowed to go "free" on the 800y pop-up range. That said, the groups with increased use (whether heat or fouling) would wander up and slightly right.
With CHF and heat treat, would the gun just blow groups shotgun pattern (shots deviating in all directions) or would we see more "walking" in a direction....at the very least gravitating toward one half or the other...up or down? left or right?
Good question. I'd love to know the answer to that, but I imagine it might vary quite a bit from barrel to barrel depending on where the stress is.
Seeing as you've gone as deeply as you have in troubleshooting, I would suggest swapping components out one at a time, starting with the barrel, and see what pops.
“You have made us for yourself, O Lord, and our heart is restless until it rests in you.” -Augustine
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