I bought a brand new Savage Model 10 GRS in 6.5 Creedmoor back in February. I have put maybe 500 rounds through it without problems. I took it to the range last week and after my 1st shot the bolt was jammed closed. I had to use a piece of firewood to break the bolt free. Fired one more shot and same thing, totally jammed. Drove to my local gunsmith who looked it over and told me my chamber is horribly rusted! I store the gun in my safe that’s inside my house. I don’t have a dehumidifier because I’ve never seen any rust on any of my other guns. I called Savage and they had me pay shipping to ship it to them for repairs. I have many questions, but most importantly is why did this happen? Anyone else hear of newer Model 10’s with bad barrels? Could this all be because I don’t have a dehumidifier? 
