the problem must have been mine, don't know how but it was. the other day i had gone to Cabelas and bought NEW REMINGTON brass to fireform for the 243AI, when i opened the bag of new brass and poured it out i noticed one case that just stuck out from the others. it had this gouge or ring around the bottom of it about 1/2-3/4 from the base of the cartridge. i checked the rest of the brass for any other like marks and didn't notice any. kind of made me reconsider using this lot of brass and i called Remington to alert them to this "bad case" and the woman i talked to said to dispose of it and they would send me some replacement brass. i asked if she wanted any pictures as i already had taken them and her response was "no, just toss the bad case." today i received my replacement brass (5rounds) and am happy with that. i still wonder if the rest of the batch is good to use or not. i have enclosed pics so you can see what you might watch out for!