Originally Posted by claphamsa
yeah! i do one sparge (I assume that means batch) my pre boil volume was low, but i measured out the amounts beermsith said, so im wondering if my software needs to know i have a crazy crack?
Software assumes an absorption rate of .10 -.12 gallons/pound if memory serves but it might be different in practice. The finer crush is likely absorbing more of the strike water, but moisture content of the grain, humidity, etc. all play a role. Software is a great tool, but you need to be able to manipulate it to your conditions so it gives predictable, accurate results.
You'll see a bump in efficiency if you split your sparge volume in half or even thirds. Try it and see.