I have not yet owned a Calvin, but I have dry fired a handful on other guys rifles at matches. Very good trigger - I'd say it's Timney's answer to the HVR, and they brought their A Game.

I don't use the benchrest springs in my hunting rifles, and I don't tune the sear engagement as low, but the light pull weight isn't the only thing you're buying in the HVR. I set them up at 2lbs and do some tinkering to be sure I have 20thou+ of sear engagement for hunting rifles.

Force of habit for me, I grew up on two stage triggers, have them in all of my AR's, so I try to mimic that in my bolt guns whenever I can.