I have read this entire thread and find it interesting there is little mention of bullet momentum in relation to killing power. I think the 6.5 CM is an awesome cartridge for what it was designed for. One of the best ever for long range target punching. It was NOT designed for and it never will be a long range hunting cartridge. It does however, have some spillover into the hunting world…good round for whitetail sized game to around 400 yards, give or take…if proper, proven, hunting bullets are used. The 6.5 CM is NOT an elk round, same as the 22’s, 24’s, and 25’s are not elk rounds. Yes I know there are thousands of elk taken every year with those calibers and some at long range….still does not make them elk calibers. Several years ago, my father in-law had several beef cows that he wanted me to put down for him. All 8-12 year old cows weighing between 1200-1400 pounds. I thought it a good opportunity to test some rifles. First up Ruger m77 in 6.5x55 shooting hot loaded 140 grain bonded core bullets. Range 250 yards. First shot broadside, right in the pocket behind the shoulder. Cow then turned quartering away and put 4 more, midway back in the ribs, aiming for the off shoulder. Cow walked off about 15 yards and went down before I could reload…dead when I got to her. Autopsy report…heart was mush. No pass throughs with any of the bullets. Off shoulder not broken. All 5 bullets recovered, perfect mushrooms on all of them. Next up…338 win mag loaded with 250 grain partitions. Range 250 yards quartering to. First shot on point of shoulder, she then turned and was quartering away for second shot. First shot destroyed the shoulder bones, on the near side, blew through the heart and created a softball size hole in the off lung. Exited rear of the rib cage leaving about a 2-1/2” exit hole. The quartering away shot entered the rear of the rib cage, took out more heat and lungs, exploded the off shoulder joint and left another a 3” exit wound with bone, heart, and lungs hanging out. Next up was the 416 rigby shooting 400gr round nose soft points. Range 200 yards. Quartering to, sharply. Shot entered point of shoulder, exited the rump. DRT, dropped in her tracks and never moved. Moral of the story, use enough gun for the animal you are hunting. Small diameter light bullets do not have enough momentum to get the job done on large game. Doesn’t matter what the sectional density number is or the retained energy number is at whatever range it impacts. Am I saying that you need a Rigby for elk…no. But I am saying that the 6.5’s are too light for elk and moose unless you are willing to wait for the perfect broadside shot inside 300 yards. You may be lucky and kill several in a row with the lightweights with no issues, but eventually runs out. Why take the chance, those majestic animals deserve better.