Odds are the chambers are 2 5/8" and as mentioned above Parker later on began suggesting using 2 3/4" shells. The theory was that if the hull opened partially in the forcing cone then a better gas seal would be made as the wads transitioned from the hull into the bore. I shoot thousands of 2 3/4" hulls each year in my Parker's and in shorter 2 1/2" English guns and have never had any difficulty or pressure problems. Nor have I noticed increased recoil. Out of respect for the gun avoid using high velocity factory rounds.
|