I recently purchased a 30-338 made on a Remington 700 action. I bought the dies and made some case out of 338 brass. I trimmed them down as prescribe and made a dummy round. They feed fine, but the bolt is very hard to close. I shorten the bullet depth and it did not seem to help. I have ordered some 30-338 brass that should arrive any day and will try again.
I was wondering if the 338 brass has to be fire formed to make it fit better? Or is something else going on. If the new 30-338 brass does not fit, then I know something is up.