yip and I suggested same in another thread and got crucified for it...H&R MAKE a survivor which has light rifling chambered for BOTH. you can make an adaptor (or buy off trademe) to fire both,through a .12ga....the chamber is near enough identicle if you keep bore same size as chamber pressures will be lower with .410 BUT the one Ive got that is approx 10" long generates enough pressure....my good lady wifey managed to drop 2 mallards with single shot through it last weekend so it just has to be working properly LOL.
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