Thanks SoTex
Sounds like it is indeed the same trigger CZ puts in their 527 Centerfire rifles and very well may be worth the extra money.
FYI,,, the 455 that has replaced the 452/453 model's barrel in NOT threaded.
They're actually selling em in a 22lr 17hmr combo package.
Not sure if CZ was going after the Sako Quad market or the 10/22 market, but from what I hear they're hit and miss in the accuracy dept.
To bad, because that 452 truly was a value.