Without knowing the particular make up of the barrel or slug, I would say that the answer is NO as slugs are generally designed for a non choked barrel.
If you really want to know take your shotgun to a firearms specialist.
This guy is essentially right on the money. Take it to a dealer or gunsmith. You should never take the chance and fire a slug though a choke--it just isn't designed for it. Use smooth bore if you want to be safe.
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