My Sauer hammer drilling is a wonderful gun. Shotgun barrels are 16 gauge. Rifle caliber is a meaty 11.15x65. I have four cases, don't know where to get more. In the meantime, the rifle barrel is used to shoot 2 1/2" .410 shotshells. A friend sold me this gun for $200. I stripped the stock finish and refinished it. The wood is outrageous for a German gun.