I am thinking this is where I will go to get a Sako Quad .22 WMR barrel.
https://riflebarrels.com/shop/drop-in-barrels/sako/sako-quad-22-wmr/I have all four barrels that I got when I originally bought my Quad (new.) I never used the .22 WMR barrel, used the .22 LR barrel only a little, also the .17 HMR. I've used the 17 M2 barrel a lot.
After having the rifle a number of years, I decided to use the .22 WMR barrel. (I have an Anschutz .22 mag that I'm particularly fond of, had it for many years, which is the reason I'd never used the .22 mag barrel on the quad.) Off to the range with a selection of .22 mag ammo to see what it likes and get the Burris Quad scope zeroed for that barrel. When switching the other three barrels around, there was only about an inch or so of correction needed at 50 yards from one to the other. My first shots at 50 yards with the .22 magnum barrel weren't even on the paper. I moved in to 25 yards and one of the first three showed on my target backer, so far to the right I quit right there and looked for a problem. I removed the barrel and very carefully reinstalled it. Same result. When I got home, my first thought was to see if the bore was concentric to the outside of the barrel at the muzzle. It wasn't. My rod-anvil 1" micrometer showed an extreme deviation of several thousandths of an inch. There is no doubt in my mind that this is why the point of impact is so far off as to make it impossible to zero the barrel and why the accuracy is so bad it wouldn't be worth the effort to do so.
I contacted Beretta/Sako CS. They bounced me around to multiple CS reps over a period of a few months, at least 2 of whom seemed completely ignorant of anything to do with firearms. One recommended I send the whole rifle to them for repair (which I'd have to pay for because I'd had it so long). I asked, how about just the barrel, it's just this particular barrel. Nope, gotta have the whole gun and the cost would be about the cost of a new barrel. They finally told me as much as to go schitt in my hat, they weren't going to do anything about it and, in any case, I'd waited too long after purchasing the rifle to contact them. Contrast that to what we get from most legitimate gun makers and rifle scope makers.
If they'd even offered to replace it at a reasonable price I'd have been happy. As it is, they left a very bad taste in my mouth and, as much as I love my Sakos (and Berettas) I will be very reluctant to put any money into any of their products in the future.