Yes indeed.

I would have to pick the 6.5x54 Mannlicher or MS because of the marvelous vintage sporters turned out by the Brits over a century ago. But...

I have a couple of Swedes in 6.5x55 and rate them very highly.

One is an M38 on an 1899 Oberndorf action, unmolested VGC+ with Metallverken Vasteras micrometer rear sight. What a tack-driver in military precision shoots!

The other is an Aussie sporter conversion, with the 1970s timber sporting stock commonly seen here, and a 2-7x28 VX2 on top.
It was my culling rifle, using 140gr Sierra Pro-Hunters, before the Ruger RSI .308, and I never found it wanting for accuracy or killing power. Replaced only because the low-swing safety was needed to carry it safely with a chambered round.

One of my hunting mates has a Ruger M77 Mk.II in 6.5x55 and carried it on several Cape York pig hunts just this year to good effect. His quote: "Everything shot with it died instantly". A rare rifle, all things considered.

Certainly agree that a Sako in this chambering would be a terrific deer or pig rifle.

And also agree with everything positive said about the cartridge.
Personally I have no clue why the .243 or the modern 6.5s even exist!