A friend of mine has a couple of Chinese 88 Commision rifles that were used hard and appear to be in the original 8x57J chambering, though it hasn't been verifed. Both of their bores are worn smooth, no usable rifling left whatsoever on both of them with one of them having a cracked bolt head by one of the lugs. I would guess ( can't prove) that these were used with full power military JS ammo in their service life and hence part in their condition now.
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Dave
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