MI is not quite that simple, page 50-51 from 2021 MI Deer Digest
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In the limited firearm deer zone, all hunters afield from Nov. 15-30 and all deer
hunters in this zone during other deer seasons must abide by the following
firearm restrictions or use a crossbow or a bow and arrow. Legal firearms are as
follows:
• A shotgun may have a smooth or rifled barrel and may be of any gauge.
• A muzzleloading rifle or black powder handgun must be loaded with black
powder or a commercially manufactured black powder substitute.
• A conventional (smokeless powder) handgun must be .35-caliber or larger and
loaded with straight-walled cartridges and may be single- or multiple-shot but
cannot exceed a maximum capacity of nine rounds in the barrel and magazine
combined.
• A firearm deer hunter may carry afield a bow and arrow, crossbow and firearm.
A .35-caliber or larger rifle loaded with straight-walled cartridges with a
minimum case length of 1.16 inches and a maximum case length of 1.80 inches.
• A .35-caliber or larger air rifle or pistol charged only from an external, high-compression power source
No bottlenecks cartridges are allowed in the limited firearm deer zone.
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