BCfred, two stage triggers are often used in position rifle shooting, with a light first stage, and slightly heavier second stage, with very little if any at all overtravel.
The reason for this is that the shooter can start the secquence, but can let down if he wants to and restart.
it would be harder to do if one could not figure out where the second satge was, because the trigger finger has already started the trigger break.
Cat
Thank you CNTHT. I'll have to try it some time. Fred