I shoot into large square bales as well but have noticed one drawback. The grass hay around here is coarse enough to eat the finish off of carbon arrows. This becomes an issue when I make up "hunting arrows" and decide to test them. I have stripped Beeman's to solid black(no wood look) and eaten well into Grizzly sticks and Gold tips. Just a thought. Its not instant, but if you shoot much at all you begin to notice it. I now use foam mostly for hunting arrows. Random thought.... I have been saving family clothes destined for salvation army for several years and recently put them into large cardboard boxes. I tape it up and use it as great indoor fieldtip targets. When you shoot up the box, dump the clothes into another box and start again. Its virtually free and makes big targets.