gun parts has mauser barrels in 8 mm and should go right on.I just has a 81 swiss barrel fitted,same problem.$25 at local machine shop.stay away from that parts changer.he could have fitted it in 1/2 hr.theres more than one way to head space.but you have to be a reloader to work it.
gun parts has argenten barrel good condition $28 or fair 98s for 35.
the arget are in 7.65 x 53 which is not bad I have an argent 1909.and grafs has ammo for $13 for 20 new privi or S&B?