I just bought a 1960 gun, (LTRK, 26.5", ) in about 98% overall, mirror bores, tiny fore-end crack in the same location as yours. My stock hasn't been cut. My gun has 3" chambers and it shoots tight for the choke designations (codes ** and **-, which is M and IC).I've always wanted a 20 just like my 1949 12, but I settled for a vent rib instead of the solid rib on my 12. I paid $2100 and thought I got a bargain. Incidentally, you can date your gun by the serial number on the Browning website (browning.com).