Digging Iron signals when around CW battle areas.

I just wanted to ask some of the more experienced guys if they dug all signals in a Civil War area. I have just about dug every signal that is good, but i have found alot of low toned iron signals. Just wondering if you thought it would be worth my time to dig these as well! Got the evening off and dont want to give up on my honey hole just yet!!! Thanks in advance!