How far would you guesstimate a .25 caliber pellet would ricochet off of a rock after travelling 100 yards? The reason for asking is I'm firing alongside a hill on my property and into a partially carved out embankment with a lot of large rocks. I'm not concerned so much with the pellets that find loose soil but with those hitting large rocks. My target is simply a large box filled with rubber type mulch. Most of the pellets stay inside the box but sometimes some make it all the way through. My closest neighbor about 200 yards away is my concern.