Hey everyone, after a couple brews and several test boils I've been able to dial in my boil-off rate, volume lost to trub, brewhouse effeciency, dead space in MLT, etc so that I think Beersmith is giving me pretty good numbers to go by.
I'm planning to try a recipe for a Samuel Smith Oatmeal Stout clone, and it calls for a 90 minute boil which bumps me up to a boil volume of 7.71 gallons. My brew kettle is 8 gallons so I don't feel comfortable pushing it this close to the brim. Would it be a bad idea for me to start of with a more comfortable volume of ~7.25 gallons, and then after some boils off, add another 2 quarts of boiling water? Will the slightly lower starting volume lead to over-utilization of the hops? Here is the recipe:
8 lbs. - 2 Row Pale Malt
1 lb. - Flaked Oats
1/2 lb. - Crystal Malt (60L)
1/2 lb. - Chocolate Malt
1/4 lb. - Roasted Barley
1.75 oz. - East Kent Goldings - 90 min.
White Labs Irish Ale Yeast (WLP004) - 1800 ml starter
Mash at 151° for 60 min.
Sparge as usual
Boil for 90 minutes