Ted Williams 300 magazine capacity

Discussion in 'Technical Questions & Information' started by Pohman Davie, Feb 10, 2016.

  1. Pohman Davie

    Pohman Davie New Member

    Feb 10, 2016
    I acquired a nice 20 gauge(2+1 shell capacity) semi auto recently, and I know it is a Winchester 1400 at heart. My question is this: Numrich parts has a 5 shot magazine spring for the 1400(all gauges), and magazine tubes as well...is there a combination of these parts that will increase my shell capacity, or does the gas system keep me from this upgrade?