Originally Posted by barnesuser28
my OD of a loaded case is .313 just what SBruce said it was going to be. I also use the sinclair expander.
Mine doesn't like lot of neck tension with the brass I'm using. I got 250rd same lot # on the Win.
I've done the 6x284 and 6.5x284 both tight necks don't ask me why! I also had Win 100 in 284 then I had one build on short action that was 20 plus years ago in fact took pretty nice buck with it.
I ordered or should say gunsmith two 7mm barrel from Lilja build the 284 with first barrel 2nd one did the 280AI and both are good barrels. I've always like the 284 case and glad others are enjoying it also.