I recently purchased a .243 lightweight barrel for my SB2 receiver. I noticed that the barrel was not locking in completely by the way the break open barrel button did not come up all the way as it did in my FACTORY installed barrel. I proceeded to SLOWLY file down the front semi-circle grove that meets with the receiver bolt that acts as the pivot point. I managed to file it down to where the break-open comes up all the way. I took it out to the range and it fired well. I did notice that the break-open button had to be depressed hard in order for the barrel to break open.
Why is this? How can this be remedied?
I am not expert so you will lose me if you get too technical. I appreciate your comments.