So my dad died 8 years ago and left me a bunch of ammo, and until now I was just stashing it for a rainy day. I went through it, and found an ammo I am totally unfamiliar with and appears to be unmarked. He bought it with a whole bunch of norinco 7.62 x .39 from an American vendor pre norinco ban. It came in a wooden case with two smaller tin cases in it, and each rectangular case has 22 pre-wrapped paper bundles with 25 rounds a bundle. The second box from the top, with the writing 7.62 x 56, is the batch in question. DSC_0753 | Flickr - Photo Sharing! Here it is opened DSC_0755 | Flickr - Photo Sharing! The tin case opened. ( the shipping info has long been worn off and is unreadable ) DSC_0756 | Flickr - Photo Sharing! Stacked alternating up and down in rows of 5 by 5 in each paper bundle DSC_0758 | Flickr - Photo Sharing! The back of each one stamped with "55" on the top and "31" on the bottom DSC_0763 | Flickr - Photo Sharing! Here's a size comparison; much smaller 7.62 x .39 on the left, unknown round on right DSC_0765 | Flickr - Photo Sharing! Has anyone seen this round before? My theory is that it is actually 7.62 x .54 for a mosin nagant that my dad purchased about the same time, but there are no markings to identify this, and my dad had several other rifles stolen, so I have no way of knowing for sure. Also how do you get the photos to embed in the thread!!??