Search:

Using CCI target ammo, shoots well with Lapua target too.
What 22lr are you shooting at the moment?

I'd recommend getting a CZ either American or Varmint and see how it shoots, you can free float...

One hole group at what range?

A CZ 452/455 will get you that at 25m and most likely at 50m too with a little work.
I shot a 8mm 4 shot group at 40m with my 452 American tonight, which isn't...

I'd look at a CZ 452/455 Varmint or a Weihrauch.
Probably be the same price to get a new barrel as it would be to get a whole CZ varmint.

What are you wanting to achieve?
Just a heavy barrel 22,...