Indiana was never a straight wall rule.
Almost was but decided to go length limits instead.
Started out .35 min
1.16” minimum length was still is
1.625” max length which was then revised to
1.8” which it is now.
We now can use rifles of any caliber starting at .243 on private lands only the 1.16” min 1.8” max and .35 still stands on public lands.
