The rifle in question is a 1909 Peruvian that is original in every respect except that it lacks a 1/4" of closing the bolt on a 7.65 round and chambers a 308 readily. The rifle's condition is excellent. My present theory is that a finish chamber reamer would cut the bushing out without harming the barrel internally or marring external finishes. Der Ami's point is well taken, but the value of the rifle depends on the barrel number matching the receiver number. My "solution" assumes the bushing is readily machinable..
