If I know it's an aluminum can the I do not dig it Everytime ... Why? Because after 40+ years and many years in the Dept of Corrections my knees are both replaced and have found enough over the years to pass a few. But yes I have found silver coins under aluminum, quite a few times. I usually dig everything above iron unless I've been digging 6-8 hours and I'm tired. Then I pass a few .. that's why I may pass a few fuzzy choppy signals. But back to original issue... If a detector can't pass the simple tests I have never found where it can do better out in the wild. So I won't use those detectors. If I'm in a field with civil war potential I dig every target above iron. Then if i get a second chance at that place I dig iffy signals. So performance has to be good for me. I don't use detectors that are uncomfortable to swing all day either. Garrett with the super short arm cuff adjustment only goes half way up my forearm. Make the detector very unbalanced. Or should I say I don't use them long term. They are sold quickly. I don't use Garrett, whites, tesoro or First Texas for my own reasons as there are much better options for me. They have to pass the simple tests first then have to be comfy, and not out of business or at least have a unit not 15+ years old as the best one they sell. So as of now XP, Minelab, and Nokta Makro would be all I use. There are several other foreign companies but don't care to try any of them.Do we ? If you know it's an aluminum can, do you dig it every single time ? My buddy and I were hunting an old school. Finds were sparse and there was a lot of aluminum. I mean a ton of cans in the ground. It's not in the best part of town. he knew it was a can and called it. I jokingly told him to dig it, maybe there's a silver coin under it. Sure enough, a nice silver Washington directly under the can.
One aspect of hunting that rarely gets mentioned is sizing your targets. If you're hunting for buttons, old coins and such and there is a big piece of brass, many will not dig it thinking it's too big. However, it could be masking something. So no, not everyone digs everything. Some like you do. I've hunted with too many guys who are hunting size specific.
Comparing an ACE 250 to a Deus like he did in one video is just silly. One cost 200 bucks and the other is 1100 bucks. If you're a long time vet of detecting, chances are you've moved up in detectors. As far as depth, it's not going to be the same across the US. Nail test is a good test but what if you have 4 or 5 nails sitting directly on top of the coin or button ? If you're getting a scratchy tone and don't dig, well you've lost what could have been a good find. The only absolutes in our hobby is you have to dig trash if you want all the goodies. Also, gold can show as iron on the Nox.