I think The 6.5 CM is now legal to hunt with in Indiana. Hope this is helpful and not miss leading.
Links below.
A state law passed in 2016 that allowed certain rifle cartridges to be used for deer hunting on private land was amended earlier this year to allow additional cartridges. During the firearms, reduction zone from Nov. 18-Jan. 31 (in zones where local ordinances allow the use of firearms) and youth seasons, rifles with a minimum 16-inch barrel that fire cartridges meeting the following requirements may be used to hunt deer on private land only: cartridges that meet the following requirements may now be used to hunt deer on private land only seasons:
Deer Hunting | Indiana Hunting Seasons & Regulations ? 2017 | eRegulations
- The cartridge must have a minimum case length of 1.16 inches and a maximum case length of 3 inches
- The cartridge must fire a bullet with a minimum diameter of .243 inches (same as 6 mm)
- A hunter must not possess more than 10 of these cartridges while hunting deer
- Full metal jacketed bullets are illegal
The 6.5 CM accepts a slightly larger caliber bullet than the .243 Win and has a slightly longer overall cartridge length. Both are also able to hold a similar amount of powder.
https://www.swggun.org/6-5-creedmoor-vs-243/