Well I stopped in my local gun store and was browsing and found a bag marked "Unknown Cal". The owner aid that he got them from a widow who was getting rid of all her late husbands gun stuff and they weren't marked. They are reloads, with 6.5mm soft point bullets. They looked like 260 Remington to me and are formed off of Mil-Surp 7.62 NATO brass so I bought them($6.00). Well I got home and broke out my caliper and I am pretty sure they arent 260 Remington. I have compared the dimensions to every common 6.5 caliber i could think of and it didnt match any of them. Here are the specs.