I have rebarreled/rechambered a number of Savage 99's - but I wouldn't do this one. The .303 Savage has a case head about .020 bigger than the .30-30; and would be more trouble than the gun is worth to alter all the things that would need to be altered to convert this gun to something more modern. Either hang it on the wall, or buy up all the ammunition you can now and keep shooting it as a .303 Savage.