Thanks for all the suggestions. Now I have some more issues. Probably because this is my first (old) drilling.

I have just got my 9.3x72R ammos from my ammos supplier and the Polywad Vintager shotshells.

For the 9.3x72R, the cartridge could not be completely inserted into the chamber. I was told by the seller of the gun that he had test-fired the drilling with the S&B 193-gr ammos. Also it says on the barrel that it is 9.3x72 N (I guess the N probably means nitro proof). Are there two types of 9.3x72R out there? The new 9.3x72R that could not be inserted in the chamber are made with Norma cases. My ammo supplier suspects it might be a different caliber or it could also be due to an undersized chamber. To be safe I am sending my ammo supplier the barrel for him to identify for the correct ammos to be used.

For the Polywad Vintager shotshells, I could hardly close the action with them in the chamber. The shell's rim at the base is a tad too wide (the vintager uses Federal hull) and cannot be completely seated inside the chamber. The action thus could not be closed properly. Are there shotshells out there with smaller rims that I should try?

Mysteries!!