Seems like he didn't size the brass all the way before he loaded them. Just set them all aside until you get a chance to reload. Pull all the leftover rounds and start over. Unlike boltactions, DR's usually need to be FL resized just like most autoloaders. Another thing, also, is that you may have a tighter chamber than normal. When you have the chance, do a chamber cast and have your sizing die made to those specs using only one type of brass as other types of brass may be thicker or thinner. BTW, please post a pic of your new toy.