My K-20 extra barrel set in .410 had to be fitted.
The headspace was off by about .010".
Made in Germany, the home of all things precision.
They also cannot make firing pins that last.
I've had Beretta 680 series guns that would accept barrels from other 680 series guns, and others that would not.
Beretta never claimed they would interchange, and if you buy a set of Krieghoff barrels from DuPont (at least a new set) fitting is included and they ship the barrels to Ottsville to meet up with your gun.
Did Valmet/Tikka actually claim a drop in fit?
