It warmed up enough today to try out the .243 I picked up at the gun show last month. Loaded up some ammo and cleared a trail to the range. Had to pack the snow down on snow shoes and put up a new target backer. First round went click. Second round also went click. Back to the shop where I took the bolt apart and checked the firing pin and spring. Couldn't find anything wrong so I made a visit to my local gunsmith. We poured a cast of the chamber and found that it wasn't chambered for .243 Winchester after all. We think It's chambered for 6MM Remington Ackley improved. Now I need to get new dies and brass. While I was there he checked the barrel and chamber and said that it hadn't been fired much and there was no wear in the barrel or throat.