started with a mk-85......this is my #1 gun for my hunt that starts Thursday in Maryland.....I have 300hp/xtp mag bullets and the gun was sighted for them with harvester crushrib sabots so I kept the same bullets but I used the hornady sabots high pressure .452 that said they were for 300mag and 240 mag bullets....cci mag 11 caps/ 90 gr pyrodex/ 50 yards