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Drake, I think that for steel barrels copper degrades accuracy less over time, because lead fouling builds up quicker. Aiui copper is no-where near hard enough to ever damage the bore.
Ghost Snake, that picture is pretty much just what rifling looks like, except you can't really tell the distance between lands because it gets blurry at the muzzle.
I think they'd fly OK, but it looks like the made the fins slightly narrower than the bore, probably to feed better. Problems could arise with the fins being slightly off-balance at launch, maybe degrading accuracy.
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