I had my Ruger .243 rebarrelled late last year to 6.5CM as I never shot it. I tend to favour mild low recoiling rounds and the little Creedmoor case got me. I have five .25 cals and three 7mms and a 6.5x55 as well but I still wanted a 6.5 Creedmoor. I couldn't give two hoots if my cartridge choices over lap. I want a 6.5x57 as well but they are quite hard to find. Maybe another rebarrel job coming up.
