I bought a used cz 452 a few years ago when I got sick of my 10/22’s lack of accuracy. It came with a trigger upgrade so I can’t speak to the “poor” factory triggers, although my 455 in 17 hmr didn’t have that bad of a trigger either. The only ammo I’ve ever fed it is the cheap bulk federal. Initially I put a 2x scope on it and at 50 yards rested over a log it shot like this.
Then I installed a 4x leupold in tally rings and sighted it in. This was ten rounds. It would of been three but they hit the same hole so I dumped the whole magazine. For size reference thats printed on a A4 sheet of paper.
Those are the only two times I’ve ever shot paper with it but it’s hell on wheels for gophers and grouse.
No experience with the tikka but I haven’t wanted any other rimfire since I got this one.