The only rules that I think should adhere to a new bore are clean it thoroughly before intial firing(make sure to remove any excess oil prior to firing) and watch your heat (shot groups of 3 or less if the ambient temperature is high).

The procedure or routines that insue with break ins vary greatly,so find one that works and go with it.

Personally I don't follow any setbreak in. I clean my bore at the end of each session, watch my heatby not firing staked groups (its not a race), my follow up groups come after the barrel returns to ambient (could be 10 mins could be longer just depends on theoutside temps)and never had a problem with accuracy or barrel life.