Found my 1st 6mm Hornady in my 6.5 Creeds! Same dang size, just necked down! Guess what I’m saying is that it appears a 6mm Hornady will chamber into a 6.5 Creedmoor rifle and rattle right down the barrel! I just sold, what I thought were 6.5’s to a lot of folks that we love. I guess they’ll catch it when the bullet won’t fit! Dang it!