Anyone have any knowledge regarding Zastava rifles? It is a very stylish rifle. I have one but I don't know the caliber. I have it narrowed down to the 25 cal. range. 25-06 brass will not allow the bolt to close. Close but not close. I am thinking possibly a 257 Roberts. Serbia made. Is a bolt action and appears to hold 4 in the mag. I tried the two suppliers who import the weapon; however, neither have records on the serial number. It is not stamped with the caliber. I removed the stock to check not numbers none. A local gunsmith tells me he can make a chamber casting, but is not always able to determine for sure.