Although I don't have a CZ 527, I have two 550's and a 453. I assure you, the triggers are plenty tough enough. I would suggest you read your owner’s manual on trigger adjustment, pull the barreled action out of the stock, and have a look-see. I also highly recommend the adjustment of the trigger.
If anything, you can remove excess travel, and over travel. If you desire, you can lighten up the trigger too. I do this with all of my CZ rifles, and as a result, I seldom even use the set-trigger, as the standard is where I want it. You may be surprised on how much lighter a trigger feels, when it has been cleaned up a bit.
If you decide to do that, I have only one point to add. Test whatever trigger set-up you like, with the stock reattached (it's not necessary to retighten the stock screws at this point), before you decide on a trigger. For me, it always feels like a "lighter" trigger pull, with the stock reattached.