I shot a 300wby, 270win and 270wsm. The 300 was first to go about a decade back. I went to 6.5cm and did not notice any negative loss in killing ability for the elk I hunt. I'm not ready to jump down to a 223 because I like the ability to shoot long distance. I'm currently consolidating my centerfire calibers down to 6.5 and 22. I'll have my 6.5cm, 6.5prc and 223 for primary use. The rest of my safe will go into gun socks.