Man, I wonder if there is a chart regarding a rifle cartridges "inherent" accuracy. We've heard it discussed before, but if I had to make a chart, it would go something like this for general hunting cartridges:
1. 6.5 Creedmoor 2. 308 Winchester 3. 22-250 4. 223 Remington 5. 270 Winchester 6. 300 Win mag 7. 30-06, 7mm Rem mag, 300WBY, 338WM, 7mm08, These are all about the same from what I've seen.
I'm not including the benchrest cartridges like the 6 PPC, BR's, or any of the new fandangled schidt you see now days, like the 6.8 Westerner, or the PRC's. The 6GT would definitely be near top, if I included newer cartridges.. Nor am I including the super old 300H&H, which we know has a good reputation for precision. We also know the 300WM replaced it when it made its debut. Similarly the 308 kind of pushed the 30-06 out of the spotlight.
If you are going to make a chart you have to expect different opinions, for example #3 on your list. a 220 swift should be there instead. #4 a 222 Remington is more inherently accurate every day of the week, #9 a 300WM should be higher on the list I could go on but will leave it at that
