With CZ you could have a .22 rifle that's set up the same way as your 527. I don't know of a T-Bolt in a centerfire chambering.

Whatever you choose I would recommend getting a .22 rimfire rifle. You can get in a LOT of trigger time for not much money. If you want to do challenging stuff then start participating in rimfire silhouette matches.

Shooting off hand to 100 meters is going to teach you good marksmanship.