I have heard a lot of mixed opinions about these rifles. I have never shot one, so cannot speak from first hand perspectives.
That said, Thompson Center's 22 rifle is an absolute tack driver. For the money, perhaps the best 22 on the planet... but still not inexpensive at something like $350. It is, however, phenomenally accurate.
Another, lower cost alternative is the Remington 597. I will not buy Remington on principle, but I have shot this rifle and was holding 1" groups at 100 yards on a bipod with no effort. I was impressed.