I had a 10/22 - did a few mods (auto bolt release, mag release extension, trigger). It was fun to shoot but I wanted better accuracy. It was shooting about 1-inch groups (or bigger) at 50 yds. I tried about 20 different types of 22 ammo too. Crap accuracy so, I sold it.
I tried out a couple other semi-auto 22's but they produced the same or worse results.
After more than a year of screwing around buying and trying 22's, I purchased a new 597 - Oh Joy!!!!
It shoots ragged little one-hole 10-shot groups at 50yds - AWESOME. (It's not Anschutz accuracy but pretty close for 1/5 the cost).
I did put a VQ hammer and extractor in it to improve the trigger and extraction (although it was fine before adding extractor).
I really like it! I have one with the Remington factory black stock (not the gray one). It looks cool and handles great and is seriously accurate with mini-mags.
10/22 ? - never again
I'm a converted 597 believer !!!
Good Luck!