416 rem mag is necked up from 8 rem mag,but is hard to find also,of coarse,thx. to remington,their good for this.I have one also,hoping Hornady will start making them like the 416 rem mag,they can"t keep up with the demand.I wrote numerous letters to remington about there brass supply,no response,and sent one to the local region rep,and no reponse.