I need a little insight here. Want to start a build using the 3 screw target action (orange trigger) but chambered in 300 win mag, now obviously i will have to swap the bolt head to a magnum head and it will only be a single load rifle, which is fine and what I intend it to be (1000yrd prone). Will everything be ok as long as the barrel is headspaced correctly and the bolt head swapped out or am I missing or overlooking something here?

Speaking of this, has anyone built a custom using the target action? and if so, how is the quality, was there any squaring or blue printing that needed to be done? please post up some pics. Thanks!!