I was recenly given a winchester 1200 buy my father, and am having trouble finding the info i need online. It is a smooth bore fixed choke. On the barrel under the model and chamber imprint it says "MOD." I think it meens modified choke... I am getting ready for a shotgun only hunt here on the Oregon coast and need to know if i can shoot slugs from this shotgun. And if so any recomendations on brand?