Bean, thanks for putting up the details from the IDNR website.

In addition to factory cartridges listed there are several legal “wildcats” that have been developed over the last few years. For example, the .358 Hoosier is one of the more popular wildcats. (I admit to some bias.) There is a long thread about it on this forum as well as other forums:

http://www.hoosierhunting.com/ubb/ultimatebb.php?/topic/41/161.html

Also, quite a few deer hunters use existing factory cartridge cases that normally contain a bullet with a diameter of .357 inches or greater, but have a case length greater than 1.80 inches. They shorten the case to 1.80 inches, reload the case with the appropriate bullet, and fire the resulting cartridge in a factory-chambered rifle. This works quite well in some cases. For example, the .35 Remington factory case needs to be shortened only a little more than 1/10 of an inch to be legal. Results in terms of bullet velocity and accuracy are typically comparable to factory ammunition.