UPDATE: Not long after posting my query I bought a UMAR 22-250.
Oly's website showed both the plain and fluted barrels weighing 9.41#, so I saved $100 and bought the plain-barrel version. When it arrived, however, it weighed 10.3#. After communicating with Oly, they realized that their website info was incorrect and offered to flute my barrel for $100. (And they corrected the website data.) I'm glad I took them up on the offer because the fluted version is much lighter and easier to use afield. The only other change I made was to replace the 5.5# trigger with an aftermarket three-pounder.
Although only 100 rounds have gone down the pipe, as far as performance and accuracy, I'm more than pleased! Without working too hard (and with my marginal eyes and a 12x Leupold) I can still put five 55-grain Ballistic Tips into 1.5" at 200 yards. (FWIW 36 grains of Varget produces 3600 fps.)
And it shoots flat: with a 200-yard zero it's only 3" low @ 300 yards, which is very handy here out west where the dogs often come in fast and don't leave you much time to piddle with rangefinders and drop tables.
I've killed three dogs with it so far: 160, 280, and 290 yards. All were instant drops, which is ironic because I bought an AR so I could get faster follow-ups than with my trusty bolt gun.
It's a keeper!!