Hello, this is straight from the Indiana DNR website regarding cartridges legal to use on state lands. The 350 Legend has a case length of 1.71 inches and is shown as approved.

Equipment on Public Land

Rifle cartridges for Public Lands (state and federal property) must meet the following requirements:

Fire a bullet of .357-inch diameter or larger,
Have a minimum case length of 1.16 inches, and
Have a maximum case length of 1.8 inches
These cartridges are legal to use only during the deer firearms, youth, reduction zones from Nov. 14, 2020 - Jan. 31, 2021 (in zones where local ordinances allow the use of a firearm), and special antlerless seasons (where open).

Some cartridges legal for deer hunting on public include the .350 Legend, .357 Magnum, .38-.40 Winchester, .41 Magnum, .41 Special, .44 Magnum, .44 Special, .44-.40 Winchester, .45 Colt, .454 Casull, .458 SOCOM, .475 Linebaugh, .480 Ruger, .50 Action Express, .500 S&W, .460 Smith & Wesson, .450 Bushmaster, and .50 Beowulf. Full metal jacketed bullets are illegal.