The basic problem with many schemes that eliminate the first stage of a trigger designed as a two-stage is that this can leave very small sear engagement, possibly enough to allow vertical play in bolt assembly to disengage sear from striker if rear of assembly is lifted just slightly. Unfortunately, lifting the bolt assembly can occur as we disengage the Krag* safety! Result: accidental discharge when the safety is turned to the "OFF" position. Not a desirable outcome.

Effective single-stage triggers for quality bolt-action rifles normally incorporate a "propped sear" design to provide generous sear engagement with that floppy bolt assembly by engineering a mechanism that releases the sear so it pivots away by mainspring pressure. Image below shows a recent Winchester example.

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*My late-production Norwegian M1912 Krag features a nifty spring designed to keep upward pressure on the "cocking piece" to eliminate vertical play and enhance a consistent pull. I don't know if this is common to all M1912's or not - but would like to learn if it is/isn't present on other Norse Krags.

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