I've been toying around with the idea of a rifled .410 slug gun. I bought a Springfield 944 action at a flea market for 20 bucks. Here in Ohio we can use 410 for deer. Where would I start? Barrel wise atleast. I've read of using 444 marlin barrels. But I can only use plastic cases in Ohio. Im thinking .405 winchester. The bullet should fit in the casing without modification. I will not be using typical 410 slugs. My plan is to use solid bullets.