I live in Illinois and love to hunt also. This is why I have chosen to respond to this issue.
First of all, the game warden needed to use common sense. No game warden needs to go and meet a hunter at "his" stand during deer season. Illinois only offers us hunters a limited time to deer hunt in the first place. We do not need a game warden taking valuable time away from us.
I for one, spend over $50 in gas when I go south for my deer hunt. I spend money for lodging, food also. The last thing I want is some game warden or a slob hunter coming in my area and ruining my hunt.
Game wardens have a job to do, but the job also demands them to use common sense.
The second point I want to make, is that the game warden should know the laws he or she is to enforce. I understand one can't memorize every law, but he or she should know the fundamental ones. Speaking of a fundamental law, he should have known that reloads are legal under certain criteria. This is like us hunters knowing we have to have a plug in our shotguns. It is common sense.
If I were you, I would contact the DNR back and politely explain your situation in full and ask for a refund. That game warden ruined your hunt and they at least owe you for the cost of your tag(s).
Are game wardens human, one might ask. The answer is simple, yes. Yes, they make mistakes like all of us. Last I knew though, there is usually consequences when one makes a bad decision.
Simply put, you have every right to be upset. I guess what would irk me the most, is the game warden coming to your stand. If he met you at your vehicle after a hunt, then one can view this some what differently.
I have said for years that the Illinois DNR needs to build a working relationship with hunters. The DNR needs to have seminars every year and explain the new laws and then open the floor up for a question/answer session. By having such seminars, a lot of "common sense" problems could be prevented.
In closing, I would have to agree with Gregory on this issue. You should have walked the game warden back to your vehicle and show him the law. Then I would have proceeded to inform his superiors of his mistake and how he ruined your hunting. Yes, he did ruin your hunting! Keep hunting, don't let a "common sense" mistake from enjoying the great outdoors! Best of wishes in your future hunts!