CZ 453 for Bench rest?
I bought a CZ 453 about six months ago and find it to be a very accurate rifle for non competition bench rest shooting! It is more accurate then my Kimber Bull Barrel bench rest type rifle! At 25 yards you should expect 1/4 inch groups or even smaller. At 50 yards it is consistently shooting half inch groups.
Your accuracy will depend on the quality of the ammo you use, the scope you mount, the type of rest you use and of course your skill!
If you are talking about bench rest shooting in a non competitive way then the 453 will provide a lot of accuracy and satisfaction. I enjoy shooting it with Federal Automatch ammo from Wal-Marts and it does a good job. Lot of fun and not expensive to shoot.
But, if you are referring to competitive Bench rest shooting in the ARA type matches then you will be completely out of the running!
So, bottom line, in my opinion, CZ453 a fantastic rifle using a good scope and good ammo with a competent shooter is very accurate and will provide a lot of fun. In a serious competitive match, it simply will not compete! Again, my opinion only.