Reading this thread has reminded me that of the eight English guns I have owned in the past 10 years, three of them had 2 3/4" chambers while the remaining five were 2 1/2" guns. I have subsequently sold all 3 of the 2 3/4" guns and kept the 2 1/2" ones. It is obvious that I like guns with 2 1/2" chambers as they feel "Right" in my hands and are idealy suited for all types of driven game as practiced in the UK.
Bob