Kwik-fill sandbag filler If you have ever struggled to fill a sandbag for use as a shooting rest at the range, you know just how good of an idea this is. Our new Kwik-Fill Sandbag Filler helps you get the sand in the bag instead of around it. It's a simple system that features a durable, compact funnel with a special long drop tube. The whole thing will fit easily into a range bag. Helpful Hint: To fill your sandbags even more quickly, add about 1 teaspoon of talcum powder to every 2 cups of silica sand. The sand will flow much more freely without clogging the filler.