My use for a "gap" rimfire, which I define as one between .22LR and .223 etc. Centerfires is primarily for critters around the house and otherwise that present themselves at distances mostly between 20 and 120 yards. I bought a used CZ455 American in .22 WMR, but found the ammo lacking in quick expansion on several critters, including woodchucks, skunks, coyotes, coons, etc...even at relatively close ranges. Accuracy at 100 yards was also disappointing, at best, with various brands/types.
So, I bought a .17 HMR fluted varmint barrel for the rifle and immediately upon installation and sighting-in, found that the rifle balances better, the .17 HMR ammo seems to be more accurate across the board, then more effective on various critters of different sizes/distances. I've reported elsewhere about my (lucky) coyote kills, but the increased terminal effects of the bullets is worth mentioning again.
Accuracy of the .17 HMR is still somewhat less than a .223 with handloads, but its so handy to just throw a bunch of rounds in a sandwich bag and into a pocket, and take three 5-round magazines with me on a walk-about, that the rifle has been with me on more outings in the woods/fields out back than anything else.
Yesterday, I made it down to the blueberry fields, potted at a few lichen-spots on boulders, and sat at my benchrest and shot several shots at orange stick-on bullseyes on my (resident) target board to try it in breezy conditions between 3 and 8 mph from about 10:00 direction. It shot a beautiful 5-shot group about 5/8" at 5:00, just outside the 3" dot with my favorite Hornady 17 grain ammo. The CCI 17 grain ammo was nearly as accurate and at about the same POI, so I can rely on using either interchangeably for critters.
Wind pushed most bullets just beyond the edge of the 3" bull at 5:00. That's about what I expected and because I couldn't see the bullet strikes with my 9X scope, due to mirage, there was no attempt to make adjustments/allowances for wind.
All in all, a fun outing, after a very long winter/spring season. Maybe next week it will dry up enough to take the pickup down the nearly mile-long dirt road.