Iím out of my technical comfort zone, but the springs can be the first place to look for a fix solution. But the problem can be much more complicated . My Ithaca sxs is dated circa 1924 and it has been used and, consequently, steel parts wear. My recollection is that the bolt needed a welding job. This is when one needs a gun expert. From my personal experience, these guys are few and there is a fairly long wait time until they can get to it.