I just got i some 12ga ultra corelok slugs. They said they shoot 1900fps out of a 2.75" shell with a 385gr slug. I am wondering if anyone has chrono' d some. I can' t figure out how they are getting that speed with a 2.75 shell. I mean the most you can get out of a 3" mag with a 1oz slug is 1550fps or so.