A properly tuned bow with a medium to light arrows will many times out penetrate a heavier arrow that is not so well tuned.
Well DUH!
When discussing this, I'm assuming he's properly tuned for BOTH. Apples to apples, and all.
No fear, Dan. I'm not stepping on your expert toes. Just discussing an alternate (and its' inherent,undisputableadvantages). Ask your buddy Rob why he's shooting the logs he isout of his 82nd.
"Because he CAN" will likely be the answer.