No restrictions on ammo and mags.
Yes you have to notify Law Enforcement if your pulled over.
MSP Link
You can not carry in these places:
Please refer to MCL 28.425o for the complete statutory text
1.Schools or school property but may carry while in a vehicle on school property while dropping off or picking up if a parent or legal guardian
2.Public or private day care center, public or private child caring agency, or public or private child placing agency.
3.Sports arena or stadium
4.A tavern where the primary source of income is the sale of alcoholic liquor by the glass consumed on the premises
5.Any property or facility owned or operated by a church, synagogue, mosque, temple, or other place of worship, unless the presiding official or officials allow concealed weapons
6.An entertainment facility that the individual knows or should know has a seating capacity of 2,500 or more
7.A hospital
8.A dormitory or classroom of a community college, college, or university
9.A Casino
"Premises" does not include the parking areas of the places listed above.
MSP CPL FAQ