I have both and I love both of them. I haven't shot my 270wsm much in the last five years since I've had the cm because the cm is so much fun to shoot. I have killed elk, deer, sheep, goats, etc. with my cm and it's worked great, but there are times I miss packing my wsm like when there are lots of big grizzlies around. The penetration of the 130 barnes and that 270wsm is awesome. I am sure that the cm would work in a pinch, but I killed a lot of animals with the wsm and have a lot of confidence in it. Don't do something you'll regret, keep the wsm and get a cm too!