TWR...
As to the safety issue, my friend... if you can't live with it, then it's probably best that you don't buy a CZ. Life is too short to live with being constantly "bugged".
As concerns the scope mounts/bolt clearance, it wasn't an issue for me since I mounted a good quality 4-12x40 A/O center-fire rifle scope on my CZ453 .22 rimfire rifle to "match" the same model & brand of scope I had installed on my Ruger #1 International (aka "RSI") in 7x57mm with the after-market Kepplinger Single-Set Trigger I had my gunsmith install in the Ruger #1.
These two rifles are "companions"... i.e., when one goes to the rifle range, so does the other due to the long "cooling off period" required by the RSI's short, light 20-inch barrel.
The Ruger #1 RSI in 7x57mm is capable of shooting some very tight little groups, but
ONLY from a barely warm or "cold" barrel. The RSI's barrel heats up with just a single round fired through it... and on the hot summer days, it has taken as long as 15 minutes for the RSI's barrel to cool back down to "just barely warm" after a shot.
As a result, after I fire a single shot out of the RSI, I put it aside for the barrel to cool off and shoot several 5-shot groups with the CZ453 which is as much alike the Ruger #1 (single-set triggers, same scope on both rifles, etc.) as I can make it.
Thus... it gives me something to do rather than just sitting there "baking" in the sun while the Ruger's barrel cools off... and therefore, I can get additional practice in good trigger control, breathing, shooting between heart-beats, etc., etc.,... those skills which necessarily must be constantly used and "honed" as close to perfection as possible in order to shoot the smallest groups possible.
And so, to address your question as to the scope mounts/bolt lift on the CZ, due to the 40mm diameter of the scope's A/O turret, the scope must necessarily be mounted high enough for the scope's objective turret to "clear" the rifle's heavy barrel. Thus, this higher, necessary scope mounting eliminates any problems or issues with the scope interfering with the bolt-lift.
Of course, a center-fire scope with A/O makes perfect sense on a high-quality, extremely accurate .22 rimfire rifle like the CZ453 since one can adjust "out" any parallax using the
Adjustable
Objective ("AO") (front) Turret on the scope.
Therefore, regardless of the range at which I shoot the CZ453 .22 rimfire rifle, I can adjust any possible parallax "out" of the scope at ANY given range from 15 yards to infinity which, in turn, allows me to achieve the MAXIMUM accuracy of which BOTH the rifle and I am capable of shooting.
As you should now readily understand... all of the above effort and expense of adding a $250 Kepplinger Single-Set Trigger to the Ruger #1 single shot rifle and mounting a high quality scope with A/O on it which cost almost as much as the CZ453 rifle itself cost then begins to make perfect sense, does it not?!?
We shooters tend to struggle for fine accuracy in our rifles... and some of us "struggle" a bit more or a bit harder than others... and as you can see, the "accuracy bug" bit me pretty darned good many, many years ago.
Strength & Honor...
Ron T.