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Birdshot through a rifled choke is going to give you donut shaped pattern that will be useless at any distance.the slugs that you are refering to all ready have rifleing pressed into them and are known as a foster type slug.you can probley fire them through a rifled choke but what type of accuracy you will get I can't say.
any shot through a rifled barrel will distort the wad and any pattern you'd like to see. Unless you're shooting at ten feet away, its a waste of a shell. Your shotgun is designed for sabot slugs, not shot.