I just got back from a gun smith friend of mine and he showed me a cartridge case he had removed from a 7400 Remington. It was a 35 Remington case which looked like a 444 Marlin, the head was nearly separated and the primer pocket was blown badly. The story: The customer brought in the gun 'locked up'. The bbl had to be removed and after great difficulty he got the bolt unlocked and removed the case described above. What was the caliber of the 7400 you ask?????? 270 Winchester! The bbl was clear and after a close inspection and cleaning it up it was found to be safe and was put back into service.