Easy to load for: Yes
Good ammunition available too...in some cases, there is no need for the rifle user to handload, unless they want to.
Good variety in selection of rifles. Even for lefties!
I have two (a bolt action and a very nice single shot), and my wife has one, because they are fun to shoot, have mild recoil, and kill a variety of game where retained velocity and energy are sufficient for effective performance on game. (good expansion and weight retention for proper penetration) My first 6.5 CM was one of the first Ruger Hawkeyes to come into Canada after the cartridge and rifles were introduced. And this based on the desire to compare it to the 6.5x55, which I had extensive experience shooting and reloading for, plus hunting experience with. One of my personal favourites because it is so easy to load for, shoot, and has great on-game performance.
We have taken moose, caribou, red stag, fallow buck and arapawa rams with the 6.5 CM, from 15 yards to 296 yards; all one shot kills with good bullet placement. The furthest any animal travelled after being hits was about 15 yards; the fallow buck that jumped at the shot and fell down the steep slope to where it died.
I *own, or **have also owned, the *6.5x55, **260 Rem, **6.5x284 and *6.5 PRC. They all shoot/shot well, and I have also taken game with the 6.5x55. (Still looking to take game with the 6.5 PRC and my newest-to-me 6.5 Swede).
The Swede has accounted for deer, moose, elk, caribou and stones sheep, from 85 to 370 yards. The only shot on game I wouldn't repeat was the 370 yard shot on the cow elk, as retained energy of the 140 gr X bullet while at approx 1,500 ft. lbs may be considered sufficient, did not provide the quick kill I was hoping for on the quartering to shot on a wary animal, that did make it into one lung. It took follow up shots to finish the job. But this really was my error and inexperience in hunting elk at the time (almost 30 years, and over 20 elk ago).
The 143 gr ELD-X completely disintegrated on a frontal shot on bull moose at 15 yards. It did penetrate the opening in the front of the chest and made a mess of the lungs and heart, but never made it past the diaphragm. The moose turned and stumbled approx. 10 yards before quickly expiring. Not great performance, but given the velocity due to the short range, not entirely unexpected. (The moose was a target of opportunity that presented itself while deer hunting.)
The only bullet I wasn't happy with the on-game performance was the Berger 140 gr HPBT VLD on a caribou at 150 yards. The caribou ran almost 450 yards after the shot. The bullet had split in two after entering the ribcage on a slightly quartering away shot, with the smaller portion passing through the offside ribs, and the larger portion turning and travelling sideways through the abdomen, ending up inside the hide near the offside rear quarter. There was no chance for a follow up shot as the animal raced through the alpine fir in its death run. It had expired by the time I followed the tracks to it final resting place.
Has there been any difference in the on-game performance between the Swede and the CM, otherwise? Not really that one would actually be able to say with any real certainty...the remaining game taken were all quick, clean kills, with proper bullet placement, and the only follow up shot was on a moose at 100 yards with the Swede and a 140 gr partition, that while the animal was essentially dead on its feet, did not fall over immediately, and I put in the additional insurance shot to finish it quickly... the young bull moose fell within 3 yards of where it took the first shot.
Any variance would have to be contributed to the bullets...and bullet placement...140 gr Nosler Partitions and 130 and 140 gr Accubonds, vs, 140 gr Barnes X, and the new Federal 130 gr Terminal Ascent...and this would come down to shot distance and whether the bullet fully penetrated the animal, or not.
To date, the only bullet I haven't recovered is the new Terminal Ascent bullet, as they have all been pass throughs, at distances ranging from 40 to 296 yards.
Moving forward, I am most likely to stay with the 130 gr bullets (AccuBond and Terminal Ascent) in the CM and the 140 gr bullets (AccuBond) in the Swede (due to its higher case capacity). But this just me and my preference.
The AccuBond has been my favourite bullet since it first came out over 20 years ago! Easy to develop good loads for, accurate and great on-game performance. I have found approx. 2X expansion on recovered bullets and typically 90-95% weight retention.
While I do now have some Terminal Ascent bullets for handloading in the 6.5 and 270 cal, I have not yet had time to do any handloading with them. The factory ammo is proving to be MOA or better in most of my rifles (the 200 gr in the 300 WSM being the only one more than MOA but less then 1.4 MOA - and still plenty accurate for hunting), and the on-game performance from the 6.5 CM has been stellar as mentioned above. I am impressed with it so far!
The OP did not state what rifle or cartridge he finally purchased... hope he enjoys it and has many great adventures with it!