Yeah nah. I have a suppressed 22 that is click only with subs. I have a rangefinder and a ballistic reticle - I can shoot it accurate out to 100m. I find that beyond 50m you get diminishing effectiveness on lethality of the subs.
I also have a 17hmr, it doesn't need any ballistics drop up to about 120m. My son headshot a bunny at 180m with it. We are regularly taking bunnies beyond a 100m. It has a DPT can (22 mag setup), and while it removes the boom the supersonic crack remains which does not seem to impact how many bunnies we come across. Yes the ammo is more expensive, but one shot and you're done. It remains absolutely lethal at whatever range we shoot at but just enough such that we can recover the meat.
So now our 22s (got 3 of them) remain in the safe most of the time.
edit: that said I would still start off with a 22, starting you kids shooting at 25m then move them out to 50m. When it comes to plinking at the range you can't beat a 22 as a training platform. And the drop becomes quite useful as a training aid for when they move up in calibres.
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