I'm wondering if the Remington ammo that I've been shooting recently is from the same planet as the stuff that I'm reading about here.
I buy a LOT of bulk-packed .22LR from "Wally World" - Federal and Remington, mostly. I've learned to steer clear of the "promotional" stuff like "Wildcat", "Thunderbolt", "Lightning", etc., which HAS proved to be pretty crappy IME. But for plinking and general practice the Remington bulk stuff that I've been getting works just fine and shoots as well or better than its Federal counterpart in most of my .22s.
I do own a cronograph (CED "Millenium"), but confess that I've never used it to check rimfires so far. As I handload for and compete with CF pistols and rifles, it was basically purchased to facilitate load development and verify that my competition loads qualify for "major" power factor. Nearly all of my rimfire shooting is just for grins and practice, so as long as it makes the can "dance" and functions reliably, it's served its purpose adequately.
For hunting small game like rabbits and squirrels, I buy premium HPs in whatever brand the rifle or pistol that I'm using shoots best. Truthfully, as often as not I'll choose my IMI "Timberwolf" .357 carbine and lead bullet hand loads at just over 900 ft/s instead. Accuracy is superb out to 50 yrds with a 1.5/5 X scope (0.7" edge-to-edge for 5 rnds) and the report doesn't seem to "spook" other potential game for as long as the "crack" of an HV rimfire does.
As for the "Yellow Jacket" hypervelocity stuff, my 10/22 won't feed it, but a Marlin M60 will chew it up all day. I've never had any feeding problems with it in any manually-operated action. FWIW, my Brno ZOM 451 likes them. While their accuracy in the other .22s that I've used them in was generally adequate (to some that might read "mediocre") the little straight-pull BA puts them into consistent 5-rnd groups of just under 3/8" at 50 yds from a solid bench rest using a Tasco 2/7X scope. As the best .22 Match ammo available to me locally (Federal "Gold Medal") will only better that by under 0.150" in the same rifle, I'm pretty amazed. I have no reasonable explanation; I'm just passing along my observations on yet another strange rimfire phenomenon.