A standard 12-gauge bore is right around .729". Most of the overbore or back-bored barrels you’ll see today run .735" to about .740".
Yeah, I’ve seen the shift firsthand out there. Used to be you grabbed a rifle for the usual threats, but once those little FPV drones started buzzing...
We went through the exact same headache at our club. Cheap or poorly aimed LEDs wash everything out and make the targets disappear against the sky.
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