I've got a commercial leather pair of sandbags filled with lead shot, and a commercial rest (Lyman I think). However, I usually use a couple wooden boards and plastic grocery bags filled with small bird seed. Warren Page wrote a book about accurate shooting a long time ago where he said that very solid bags (like filled with lead shot) generally produce the best accuracy with small rifles, but softer rests work bests for larger, higher recoiling rifles. It seems that the bird seed in bags produces a point of impact more consistant with the rests I use hunting than the bags filled with lead shot, at least for my large rifles.