I have 5 boxes of Prvi 6.5x55 139gr sp ammo I bought quite a while ago. I desided I should shoot it for the brass. When I chambered a round, it was hard to close the bolt, and a very heavy lift also. I tried a number of cartridges, they were all the same. They will chamber in my M1938 though. When I measured the brass it is .035 too long. You can see the brass (Neck) "shined" up from being to long. I guess I'll shoot it in my Military rifles and use re-loads in my hunter. Rifle is a 1963 Husqvarna M1600 small ring '98 action. It is mint.