Discussions on my nitro proved WR on another thread got me to thinking and making some calls to gunsmiths. Let's say I have a 12 gauge gun with questionable barrel strength. There is a procedure for making a chamber sleeve by removing the forcing cone and deepening the rim rebate to 1/4 inch deep. Then an insert is turned to fit and locktited in place. The insert is then chambered to 16 gauge. There is the benefit of the extra steel in the chamber and the pressure drop when the 16 gauge charge is fired into the 12 gauge bore. The velocity of the shot will drop as the result of the charge expanding into a larger volume. Are there any data on the effects on chamber pressure the force on the gun, shot velocity and pattern density?
Another example would be a gun with excessive barrel wall thickness. The barrels could be reamed to a larger diameter, effecting making a 12 gauge with an 11 or 10 gauge bore. What would the effects on the pressures, etc in that case?
Last edited by Vol423; 11/16/23 11:47 PM.
