I found some 12 to 28 ga. Little Skeeter chamber inserts I forgot I had. I ground and angle on the leading edge and they fit perfectly in a 2 1/2" chamber. A 28 ga. shell dropped in nicely and the gun closed properly. The gun is nito proved for 3 ton which I understand translates to 6,720 PSI. According to my Hodgdon book the 28 ga. shell generates 10,800 PSI. I was afraid to try it. Will the chamber insert absorb the extra pressure? Once the shot charge leaves the insert will the 12 ga. bore diameter reduce the pressure down the barrel to a safe PSI? What do you think?
