Okay, how many of us have well used 1893s with a wee bit of extra headspace? Wisner makes locking bolts for 1894 Winchesters in 4 sizes: Standard, .005", .010", and .015". Does anyone know of a similar setup for our beloved Marlins? What, exactly, gives way over time to allow the headspace to increase? Does the receiver stretch? Does the metallurgy of the bolt allow it to compress? Does the locking bolt compress? In my locker, the most excessive headspace is in my 1920 Savage in 250-3000. Is it a quality issue, or did someone shoot the hell out of my rifle? Hmmm.......any theories?