I have a target new 6.5x55 that I built. I'm planning on building a 6.5x55 to hunt with as well. I also have a collection of Swedish military rifles that I have been shooting cheap plinker prvi ammo in. I planned to save my lapua brass for the target rifle and use the prvi brass in the new hunting rifle. I'd hate to lose lapua brass is the woods! Tonight I sized the once fired prvi brass and it won't fit in my target rifle. I can't close the bolt. I know I have my chamber set tight, but I still figured I could reuse the brass. I bottomed the die on my the press plate and using my case comparator I was still 0.004 from being sized down to the once fired lapua brass size. I guess this is due to the enlarged/worn military chambers. Is this brass useless now? Any suggestions on how to get it to size back down enough to be used? Before somebody asks, I can shoot the factory prvi ammo in my target rifle with no problems and it sizes back to where it should.