Guys, this is an interesting topic, I just hit on it today. Don't have any experience with a 180# elb vs a four finger oak door, but I can relay a personal experience with a 60# osage flat bow and an arrow that went through the target, through a bale of hay, into a 5/8" of slighty weathered plywood and protruded out the back 8". Could a wooden shaft survive hitting 3" of solid oak???