I' m confused about some ammuntion I bought. I bought some Remington Premier Copper Solid 1oz. hollow point magnum sabot slug for my shotgun. I have a single shot smoothbore 12 gauge shotgun. I was reading the warnings and cautions on the box and well...got confused. Heres my problem: On one warning it says.....

WARNING: This ammunition is designed for use in fully rifled barrels or rifled choke tubes only....ect..

Ok heres another caution on the same box:

Caution: These shells must not be used in guns having Damascus or twist steel barrels, or chambers shorter than 3 inches...ect..

Ok now maybe im dumb founded or something but I dont get it...lol. Please help me out and explain the difference!!

Many Thanks,
(dumb-founded) Outlaw

ps. I am safe shooting this shot out of my gun?