The bottom groove is not a "cannalure", it is simply the extractor cut or rim "rebate".
A cannelure is on the projectile and is where the case neck crimps into the bullet.
I agree though, toss the ammo, it is not worth the risk! In fact it would have negative value to me.
If you can figure out what the semi-rimmed lead rounds are, they may be "collectible" to someone- but not for shooting.
JMHO.
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03man(Don Voigt); Luger student and collector.
Looking for DWM side plate: 69 ; Dreyse 1907 pistol K.S. Gendarmerie
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