I’m getting ready to jump from the 1 gal. to the 5 gal. extract kits. I was wondering why the instructions call to boil 2.5 gallons of wort, then add 2 gallons of water to the fermentor and finish by topping-off to 5 gallons? Why not just start with 5.5 gallons and do a full volume boil?
Is there any measureable difference in taste/clarity/shelf life between the two methods? Is a full volume boil the preferred method, and if so, why?