Well heck, if thats true, I might learn to adjust mine. I Just went to Cz's website and it looks like they say both models are adjustable. Anyway, Savages are very good w/ adjustable triggers. Cz's are very good w/ adjustable trigger.
Here is the 452 model description which I have in .17 HMR "The CZ 452 actions are manufactured from steel billets not tubing or plastic, the barrels are hammer forged for accuracy and long life. The trigger is adjustable for weight, and the safety is located above the rear of the bolt and provides a positive firing pin block. Single shot adapters, 5 rd magazines and 10 rd magazines are available for this line of rimfire rifles. "
Here is some info on the 453 Varmint:
"More on the single-set trigger:
The single-set trigger provides both a standard hunting and a light, target style trigger pull on the same rifle depending on the demands of the situation. By operating the rifle in the same manner as any other bolt-action rifle, the rifle functions with a normal hunting rifle trigger pull (adjustable down to 2 lbs). If you are shooting from the bench, or have time to set up for the shot, push the trigger forward until you feel and hear a click. Now your normal hunting rifle has a target trigger pull (adjustable to less than Â½ lb)"
I am not well enough informed to offer any other advice.