I have an Encore 6BR 1-14 twist w/OTT barrel 16.25" SS and I have been shooting Lapua brass, Well I got a Savage 6BR 1-12 twist right bolt left load and eject. It is real tackdriver. After scoping it and going to the range brand new lapua brass worked in the rifle fine, loading and ejected fine. I had some extra brass I have shot in my pistol. So I loaded a box of them up to shoot in my rifle, would not chamber at all. Brought them home pulled the bullets Again I FL resized them still wouldn't chamber, so I again FL resized them with a 6BR SB dies, still won't chamber. I tried setting the die to touch the shell holder still no luck. At this pont I took the new brass that I hd shot and resized and put them into the rifle and they loaded fine. I have never experienced this before and have loaded ammo for 35-40 years or more Has anyone had a simular experience. I guess the only solution is keep the brass seperated? Both the Encore and the Savage are quality firearms. Thanks Lou