Well Stevie, I would say you fall into the same class as occupied by 90% of all shooters. You pay too much attention to ballistic tables!
Since being a teenager, I can spout off ballistic tables in my sleep. But I like to think I am in the other ten percent of the shooters, in that I sure don't get excited, or pay too much attention, to ballistic tables. Ballistic tables are a vital tool for those in the industry who must come up with a "better" rifle/cartridge/bullet/etc, every second year, at least, or else be left behind and gone from the industry.
In the years before I was a teenager, I saw, and knew of, moose and elk being killed by virtually every calibre of firearm that blew a bullet out the barrel. The vast majority of the men shooting those rifles knew absolutely nothing about ballistics. Ask ten men who fed their family from game killed with the 30-30 they used and I would be very surprised if even one of them, knew the approximate velocity of the bullet from their 30-30!
The 243 was really a new cartridge when it came out in the 1950s. It received a tremendous amount of hype, some of which was true. Remington's 6mm was a bit better on paper, but by the time Remington got the proper twist in the barrels, it was too late. The good 6mm Remington died, burried by the superior Winchester advertising machine.
The 243 is still an excellent, light rifle cartridge, good for many purposes, including shooting deer and antelope, at least. I have seen goats an moose shot with the 243 and they died without even knowing it was the skimpy 243 that downed them. Above all, the 243 is a very nice rifle to shoot, thus it is often shot with greater accuracy than is a heavier calibre.
The 243 is on it's death bed, due to the hype dolled out to such rifles as the 25-06.
So Stevie, this is just my usual long way of advising you to quit looking at the ballistic tables and get the calibre you want. From reading between the lines I can deduct the calibre you really want is the 243. Get it and I'm sure you will be happy, if you quit reading some chart that "proves," their product is better.