I have never measured the chambers. I assume they are 2 7/8. They aren't mentioned in the Prussian proof marks. I don't know what the standard was in that country. A 3 1/2 inch ten couldn't blow up that gun. The wall thickness is quite good and it has double underlugs and very well fitted doll's head extension. I have used the gun in the grouse woods, and, at 6 1/4 pounds, it is a pleasure to carry. My companions think I am Superman to carry a ten all day without complaint. It has 26" barrels, the orignal (looking) leather covered Silvers pad, and intelligent stock dimensions.
