Ok, I have done 6 beers now, first two Better Beer kits, Russian Imperial and IPA. Both of them turned out great SG was right around the low end of the kit's instructions. The last four, two listerman's and 2 Better Beerand the SG's have been over .010 low. The Scottish and Pale Ale were both over .015 lower than the instructions said they should be. They tasted good, but you could tell they were weak. The Winter Warmer, was lower by .007 and my next Russian was .018 lower still in fermenter. The only thing I can think of that has been different these last few times has been the boil has never gotten that intense. I have been boiling in a 5 gallon pot with 2 gallons of water. First couple the wort got close to boil over, but the low ones have not gotten close like that. They just boil along, without really getting that high. This last RIS, I left the burner on high the entire time and the wort just rolled along, but never really rose much in the pot. What could be causing my low readings. I know kits are usually low but I got within range the first 2 times but not since.