I COMPLETELY agree that because of today's packaging and the shrapnel associated with it that large coils in modern parks are getting to be un-usable. The barrage of caps,foil,etc. makes for some VERY bad conditions. Aluminum cans,when run over by a lazy groundskeeper, can turn into a hundred targets in an instant. Yesteryears practice of building parks with garbage fill doesn't help either. Unless the ground hasn't been touched by excavators or dump trucks it can be very difficult to have a productive hunt when looking for old coins. In EVERY site I hunt regularly,about 15 of them,I have found ample evidence of garbage being purposely buried,as in what a landfill would have. Not the entire site,but at least SOMEWHERE on the site. It sucks,plain and simple. That's what we have to deal with I guess,and every so often were rewarded with a good find. I've found 3 silver dimes in my most heavily hunted park in the last month and a half....a 58 Rosie,43 Merc and 03 Barber. None were more than 4" down,which blew my mind. They were all disguised in amongst the junk. I just hit them at the right angle in the right day,or just never swept over them before. But there was garbage to some degree around all of them.
The X-8 has been doing a lot better since I reset the machine. One thing that has helped is to turn FAST "ON",it will clip the signal just a hair but does better at recovering when in the garbage,and it seems like that's all the time anymore. I love my stock 1050 coil but I don't think I COULD ever use something bigger,no matter how much depth I wanted to get. Going deep isn't possible when the machine will latch onto and report or null on a target higher up in the ground before it ever sees the target at 10-12". I don't know, I have the same frustrations you do when it comes to parks. Next year I won't hunt any,it'll all be private property,that's my goal for 2016. I don't want to hunt any more public ground,it's just not where it's at for me. Maybe I'll come back to them in ten years when I'm really good at this,and with a large coil. Maybe not.
Kevin