Heck, be a smartass all you want - it's part of being a brewer, right?
Sorry I wasn't clear and I'm sure it's as obvious as it sounds. We're doing a mini mash, so our final boiled wort won't equal 10 gallons - more like 4-5, then we'll fill the rest with "clean" water in the fermentor. I want to make sure both buckets end up the same gravity, etc. and wanted to make sure there wasn't some ingenius way to pour 40+lbs of liquid quickly and evenly into a container. Our fermenting buckets have volume indicators on the side, so I wanted to make sure I wasn't missing something.