A gentle suggestion.

Stop screwing aound and buy a quality 300 Winchester Magnum. It will kill anything with the right bullets in the hands of a good shot and ethical Hunter. Would it be my first choice for Elephant, Buff or the big bears …. no. Probably illegal as well. Are you ever going to hunt these ? If so, a 300 RUM will add nothing except a few FPS, big muzzle flash and kick the snot of you.

Nothing big enough or far away enough lives in Europe. The 6.5x284 makes some sense but it frys barrels and ammo is hard to find. For practical hunting, it will do nothing that the ancient 270 WCF will not.

If you just "want" something, then buy it but don't deceive yourself that it will make you a better shot or hunter.

Best Elk hunter I ever knew killed way to many to count. His rifle for 74 of his 94 years was a 94 Winchester rifle in 30 WCF with a few special factory orders features. His ammo was whatever 170 gr flat point was on the shelf. A box of ammo lasted many years. His secret ? "You a'int hunting Elk until you can smell them." At 50 yards or less you put that 170 flat point through both lungs and guess what …. they die.

Let's make KISS the word of the day.