I don’t have those exotic calibers. I have 06 and some foreign calibers and I have 45-70. That’s about it. I actually don’t have my rifles to shoot game with.
If you want to play the sniper game a 30-06 or .308 is just fine. You need a range finder and a high end scope to adjust for the distance, then it’s all about shot placement, and that’s all about skill. Out of my league.