A friend of mine's father ran a small gun shop for years in PENN and would tell us all kinds of stuff from over the years. When the 7MM REM MAG came out in the early 60s and everyone had to have one, he had all types of Mausers and a few rolling blocks come in with the owner wanting it rechambered or rebarreled to 7MM REM MAG. He said he rebarreled a few M70s, M721s, and FN Mausers but not many. He turned down all other rifles and explained to them that the old rifles wouldnt handle the new cartidge. Most understood and bought new guns.
