20mm ID needed

A friend sent this photo. He wants to know if one can tell a dummy from this number alone.(PBM88BM555.016.M55A3). Basically, he wants to know if it is a dummy or a live round.

There is no way to tell if its live or not just by those numbers. A M55A3 is a TP round. As for being live, does it have a striked primer? Does it sound like it has powder in the case?

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the case look fired (crimping blow out) and little deformed


As ammogun stated the crimp is blown out . I suspect that a good tug on the projectile will pull it out.

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No audible gun powder movement.

and the primer is clearly fired

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