I just started a fruit wine using sliced frozen strawberries and chopped dates. The recipe said to make 5 gallons and to add 13 1/2 lb sugar. I added water to 5 1/2 gallons, including the fruit, and only 9 lb sugar. The initial SG was 1.1 so I increased the water to 6 1/2 gal and it still has an SG of 1.0 not taking into account the sugar in the berries and the dates. The volume of the berries is such that it dominates the total volume in the primary and I feel confident the berries are not as sweet as the water. My point is this, unless the fruit is macerated there is no way to get an accurate SG. Even if you do macerate the fruit the pulp changes the density of the water, thus confounding the measurement. I have had tremendous success with steam-juiced fruit. which eliminates all these issues. This my last attempt at a fruit wine which has not been steam-juiced!