In Wisconsin I do believe that we are limited to 1.5 power scopes. Best check your local regs.
Muzzleloaders
I also found that hard to fathom, so I did a search. You are close to being right. You can use electronic calls but next to no scope. Just the opposite here in Ohio. We can scope but no elec. call.
Muzzleloaders that are discharged from the shoulder must be at least .45 caliber if
smoothbore and .40 caliber or larger if rifled barrel, and must be loaded with a single
ball or slug to be legal for deer hunting. During the 10-day muzzleloader only
season (Nov. 30Dec. 9), muzzleloaders must have a solid threaded breech plug,
only be able to be loaded from the muzzle, and may not have telescopic sights (1
power or less are legal). Telescopic sights are legal to use on muzzleloaders during
other firearm seasons. Note: Inline muzzleloaders are legal to use during the 10-day
muzzleloader hunt with black powder or any black powder substitutes.
Muzzleloaders may be used statewide in all areas open to hunting deer with guns.
Muzzleloading handguns must be .44 caliber and larger with a minimum barrel
length of 7 inches measured from muzzle to breech face, and fire a single projectile
weighing 138 grains or more to be legal for deer hunting.
Black powder revolvers are legal but not for hunting deer during the 10-day
muzzleloader only season (because they are capable of being loaded by the cylinder
instead of the muzzle).
10-Day Muzzleloader Only Deer Season
A hunter or at least one member of a group hunting party must have a valid, unused
Gun Buck Deer Carcass Tag or Antlerless Deer Carcass Tag to participate in
the muzzleloader only season.
Blaze orange clothing and ground blind display requirements apply (see page 21).
The 10-day muzzleloader only season will be held statewide except in all metro
units outside of the CWD Management Zone and some state parks.
Antlerless deer may only be harvested with unfilled Antlerless Deer Carcass Tags
in units for which they are valid (see exemption for qualified military personnel
and disabled hunters on pages 13 and 14).