When working up a load, whats the favoured approach?
Do you start at the lowest charge and put 3 rounds onto paper and monitor the grouping as the powder charge increases, then take the best powder weight and adjust the COL to tighten the group further ?
Work up your powder charge until maximum or you get pressure signs (not worrying about the group), and then adjust the COL to get a decent group from the charge?
Does the second method always work? Is COL the fundamental variable in load grouping?