I love my PPK. I bought it new in 1974 when they were still made in Germany.
They came only in blue then, so for the purpose of preventing rust and wear from concealed carry, I had it done in satin nickle. The company did a great job, and most people who see it think that's it's stainless rather than a finishing job.
It's reliable as can be, and being the rugged little pistol that it is, it's had some range time on it and is a fun shooter.
But... (there's always a "but"); fast forward to over three decades later.
I still love my PPK just as much as when it was knew, but lots of things have happened since the '70s in the gun world.
Where the PPK used to be the best, most reliable pistol for deep conceal carry, there are now other options that are as reliable, but also much lighter and smaller as well.
I've recently bought a Rohrbaugh R9S Stealth, and I have to say that as much as I am fond of my Walther, the Rohrbaugh has totally replaced the PPK for deep conceal carry.
The R9S is significantly smaller, half the weight, and it's a 9mm vs. the .380 of my Walther. Additionally, it's proved to be very reliable.
Yes, the R9S is a "thoroughbred" that requires some extra attention, but it's not a plinker or range gun; it's a specialized carry piece that you can count on when the time comes.
So while I'm keeping the PPK, it's the Rohrbaugh that goes with me these days.
Bottom line for the OP is that you'll love the PPK as a range gun because it's all steel (or stainless if you wish) and will hold up to extensive shooting over a long period of time. It's a joy to shoot with the caveat that some people complain of the "PPK bite" if they hold the grip wrong when firing, but I have personally never been bit by mine. Maybe because I like it, it likes me.
Just don't think of it as a target pistol, because it's not. It's just a small, fun pistol that will hold up well because it was designed in the days when "ruggedness" was one of the very first priorities of pistol design, and damn the weight, because real men don't care about weight.