RE: Load after the hunt?
It all depends on what you consider "waste"!!!!
Some folks enjoy squeezing the trigger on their MLs. They prefer it so much that they rather spend $1.25 per shot & have fun - versuspaying $1.25 for a16.9 oz Pepsi at lunchtime. My loads only cost me roughly 72 cents per shot. I have no qualms about shooting 4-5 shots at times. We all pay a certain amount of money for our recreation activities at home - so expect to pay a little when engaging in this recreation sport. Besides, a single shot per day gives most of us piece of mind that our loads will be fine for the following day hunt.
My per-shot breakdown:
30 cents for powder (777)
30 cents for bullet (50-pk bulk pistol bullet purchase)
12 cents for plastic sabot (50-pk Harvester or MMP)
Two more things you need to consider when making that decision is how water-resistant your ignition is -and what the humidity factor is for those few days outdoors. Humidity is a powder killer! It's not uncommon for shooters who particpate for four day hunts - to unknowingly hunt three of those four days with a wet ignition & no chance to harvest.
The only way to find out how your ML reacts to weather conditions - is by testing that gun first after questionable weather days & studying weather effects on it. No one here can tell you it's perfectly all-right to hunt those four days without changing your powder. You need to find that out yourself.