Maybe Sunday I'll get a chance to shoot a few of the CCI copper 22 LRs. They are small at 21 grains, and the box says 1850 FPS. Wind drift is probably going to be interesting...

OK, it's Sunday. The CCI copper 21-grain bullets hit about 2-4 inches higher at 50 yards than Federal UM22, and with about twice the wind drift.
The grouping wasn't wonderful but not outlandish either.

In my experience they shoot horribly, like any other nonlead 22LR I've tried.

I'd read ridiculously poor reviews on them, but was still dumb enough to try them myself. My best example was a 10/22 with a Volquartsen barrel and 4.5x14 Leupold that shoots about 1/2" or a bit under for 5 shots at 30 yards and keeps them inside 1.5" to 2" at 100 yards. That's for just okay lead bullet ammo in good conditions. That gun shot the CCI Copper ammo in about 2" to 3" at 30 yards (that's a bigger group than a squirrel at just 30 yards!!!!) and only 1 round of my 5 shot group even hit the entire paper on the backstop at 100 yards. I tried them in a couple other guns and they were worse!

The Winchesters are better than the CCI Copper, but still don't shoot well enough to consistently hit squirrels. I'd swear these nonlead 22LR shells are designed by anti-hunters... or squirrels. How can something cost that much and be so inaccurate? Can't anyone make an accurate nonlead 22LR?

I'm going to migrate over to 17 HMR for squirrels. It's more expensive, but at least that nonlead ammo is accurate.

Rifles are all different. I got worse groups from the Winchester tin bullets in a 513T, than the CCI copper that was shot from a 521T barrel.
Neither was as good as Federal Gold Medal Target.
Our sainted legislature should have left rimfire bullets alone; what they've done showcases leftist ignorance.