Cool man

.
From what I've read so far, and watched on YouTube, i'm perty sure it's 100% possible to knock off small targets like that, at those ranges, repetitively. I would probably be leaning toward pellet pistols, bb's are pushing it at 10yds, especially for such small targets. But if you have a high end gun (rifled steel barrel is always a bonus), and practice a ton (just like any pistol shooting), you can totally do it. I wouldn't varmint at those ranges with bb's, pellets are the way to go, especially with high fps (400 and over is my comfort zone).
You'd be surprise at many of these gun, they push lead out with quite surprising power, I know I wouldn't want to be at the receiving end, that's for sure! To tell you what exact gun to buy, is like trying to find a needle in a hay stack, just like there full counter parts. Every gun out there is different, they all have there strengths and weaknesses. You basically have to break down what you are wanting, and go from there. I'm a newbie at the whole field of air gunning too, I just watch lots of youtube videos, and read tons, basically a few months of research/hunting ahead of you.
Basically, the best way to start diving into things, is to go onto YouTube and watch vids from good channels. One of the best, IMHO is Replica Air Guns, website and channel. He's very through in his reviews, dives deep into each gun. And the video quality is excellent, which is a bonus for sure.
https://www.replicaairguns.us/
https://www.replicaairguns.ca/
He was probably one of the first channels dedicated to air guns out there. Now there lots, just have to know where to look.
Airsoft is another genre that a person could look into, but that's a whole nether ball of wax.
You mean dumbed down as in lowering the fps, i'm not sure about that.
Shooting in the house is one aspect of them I STRONGLY advise against. If you have a range in the basement, totally fine. But fooling around, don't ever do it man! I could tell you a horror story about how I learned, that it's plain dumb. You got to remember, these ain't toys, they are real arms, that need to be treated with respect, just like there full size counterparts. Why I say that is because (especially bb's), like to ricochet. You can build a pellet trap, but that works only for pellets, and I still wouldn't risk it around people/valuables. Companies are working to fix that issue, coating bb's is one solution, helps, but doesn't solve it. Another is to produce, what people call frangible bb's (Dust Devils is one product name). Basically when they hit something solid, they fracture into a million tiny pieces. But I bet your wife wouldn't want all that junk flying around the house. Even with those, I still wouldn't take chances in your living areas.
Basically I like to think of them as the scaled-down counterparts of there big brother, with there lead being propelled by a different source, either compressed air, or air powered by a powerful spring.
Modern day air guns are not like there ancestors of yesteryear, many are powerful enough to take on any game on this planet. You want a eye opener, take a look at the Umarex Hammer. She's a .50 beast of a rifle, one took a cape buffalo at 25 yards. Hit the floor seconds after being shot, power for ya!
But i'm getting way off track here, me for ya, I could talk about this stuff all day

.
Anyway, back to the question at hand, CZ's are a great place to start. They have contracted out to ASG, to design and produce exact copies of there full size brethern. Even better, they just released 2 new shadow II models, which look sweet. Only in airsoft at the moment, pretty sure bb/pellet versions are on the way. There made in Japan too boot, top quality craftmanship throughout. They due have the full line of 75's, probably some of the best air pistols on the market at the moment, IMHO. They do have 2 versions of the sp-01 shadow 1, if your interested in those. I'll post the link to there us site so you'all can take a look.
https://actionsportgames.us/en-us/produ ... 7%2F4.5+mm
Hope that helps tongueriver, I got bunch more info to share, but latter, she's getting late here (I've done enough binging for awhile

).
Willy

P.S. Officially my 1420th post since joining last Jan the 9th. Boy time flies, and I talk a lot, that's for sure! Maybe JerryD is rubbing off on me, which isn't very helpful because I talk to much anyway

.