Inside Sub-Gauge Inserts

Shotgunners perusing shooting periodicals these days encounter numerous ads for sub-gauge chamber inserts of various designs and lengths. These devices allow the use of shotshells smaller than the gauge of the barrel(s) of the gun itself, often with claims of excellent patterning performance and velocities. A high percentage of Shooting Sportsman readers own foreign-made shotguns, many tend to favor non-mainstream gauges such as the 16 and 28, and more than a few own guns with specialized chambers such as 21/2".

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