I have been trying to find out if a 4x6 oak plank would suffice for a back stop for 30-30 from a Marlin 336. This oak is so hard it is almost impossible to drive a 16 penny nail all into it. Would this oak stop a 30-30 from maybe 50 yards out? If not then I need make a new backstop. Maybe a couple yards of sand in front of the oak wall would be needed.