I second the Lyman, but remember many MLs have a "sweet" spot where they achieve maximum accuracey, and it may not be at it's max load. In fact I've seen serveral MLs that would handle balls with 75 - 90 grains of powder great, but above 90 their accuracey really dropped. This is not to say a ML can't shot a ball and more powder well, just that their are no gurantees.
Winter is tough on whitetails, that is an accepted fact.
You can help the quality of your herd by providing winter plots - that are not necessarily designed as kill plots.
Having what I call green plots - that the deer can browse in when most of the other food is gone, can greatly benefit the deer herd when they need it most.
Come December - at least in our area of the south - most of the mast is gone, all of the crops were long harvested and this green browse can really make the difference for...