Rifle (SS heavy barrel) has only been shot about 50 times. Went to range today to try it with 20 grain ammo. Last time I used 25 grain ammo. Very humid, hot day and no wind. Fired about 30 rounds at target 50 yards away. Bolt had been getting a little stiffer to work until I had to just smack it hard to get it to open. It did not, and would not, eject the shell. Barrel of gun was very hot also. Did not have a cleaning rod with me so I took the rifle home and got the brass out with a rod. Barrel had cooled down until it was just barely warm by then. Went back to the range and shot another 25-30 rounds and the same thing happened. Barrel was very hot again. Nothing wrong with the extractor or any thing else that I can see. Do you all think that is what will happen when these things get hot?