What are the "standard specs" for action screw torque? Here's what CZ USA says in their FAQS:
Q: “What are the correct torque specs for the 455/457 action screws?”
A: The correct torque specs for wooden stocks is 25 in/lbs, and 35 in/lbs for models like the Varmint Precision Trainer and Chassis.
h t t p s://cz-usa.com/support/faq/
That's 25 inch-pounds for wooden stocks, both the front and rear action screws, from CZ.
As an aside, I suspect a lot of guys who swear different torque levels for front and back simply happened to get better results because of ammo variation or inconsistency, not because the rifle itself significantly shoots differently with a few inch-pounds difference between front and back action screws. They assume the different torque levels account for any differences they see rather than the ammo.
To verify, keep the action screws at the same recommended torque and shoot at least four five-shot-group targets with any ammo often used with CZ bolt action rimfire. (I suggest four targets to more clearly illustrate the point.) Compare the targets and see if any of the target averages are the same. You'll have four different averages, some much different than others. This reflects the ammo variation or inconsistency. The same thing will happen with the alleged "standard" of 30 in the front and 25 in the rear.
