It's Michigan House Bill 5249 and right now it's stuck in the committee on Outdoor Recreation and Tourism. Not to get all political but, I think with all the gun control issues the bill is being stalled and who knows when it will reach the senate.
I spend most of my deer season in the south zone and would love to see this pass. Since I relaod, I would get a 44 mag barrel for my TC Encore in a heart beat and would have no need for the premium slugs any longer.
Here's a link to the bill:
http://www.legislature.mi.gov/(S(dmb...e=2012-HB-5249