I do not own or never have shot the CM but I must say I like bigger calibers. Let me just get my two cents in before everyone bashes me. 6.5cm to the vitals will kill a deer just like 300 win mag. Everyone says 243 is a perfect Whitetail rifle. Here is my issue and it is from live experience with my wife. She has shot well over 30 deer in her life.
20 of which was with a 243. She has yet to lose a deer, however, on 5 occasions we had VERY VERY difficult tracking jobs. 1 was her fault (gut shot) the other 4....believe it or not...were either heart or double lung shots. The issues we had were the bullets sometimes did not bust through the offside shoulder depending on how the animal was facing. This lead to no exit with little to no blood. 3 deer traveled well over 100 yards on double lung shots! One was in the rain. Took us an hour to find it. The other 2 about 45 min. However, the last draw for her was this one time she shot a buck that was running. (I told her never shoot a running deer). Anyways...no blood nothing. I said you must have missed. She said...no way...definitely hit. So we looked...and looked....and looked. Did spiral patterns and everything. No blood. Called up a few buddies. After 3 hours we all basically gave up and walked back towards her stand. On the way back...my buddy looks at a large briar bush and says ill be a son of a bitch...theirs your buck. He could just make out the white of the tail. When we got close...sure enough it was her buck. The buck was hit in the heart ran 60 yards and jumped into a bush and died! There were no tracks, no blood, nothing! If he didn't see that tail...the deer would have been left for the crows. That being said...she decided to move up to a bigger gun. Since she has moved to the 7mm-08 every deer has been drop right there. Which actually now her complaint is it is boring because we do not get to do anymore tracking. She shoots 140grain accubonds going about 2800fps. The recoil is light. Since this I have even purchased myself one. It is a very flat shooting cartridge does everything a 308 will with a flatter trajectory. Just my two cents.