I wouldn't run slugs through an SXP. Barrels are over bored to the point that slugs are unstable in the barrel.
Winchester also advises against it. You can try if you wish, but the slug will not perform as it would in a non back bored barrel.
I have been getting mixed reviews regarding this. Documentation seems to say that it's fine and even mentions the use of rifled slugs in the owners manual. I spoke to a Winchester rep regarding a scope mount and they said that these guns were designed to still work with slugs. I guess you mileage may vary. I'm going to give it a shot in a couple weeks while sighting in for turkey. We'll see how it goes with challengers.



























