The law that first allowed rifles for IN was not "pistol cartridges".

By mandating .35 cal min and a max case length of 1.8" it did favor the pistol cartridge rifles. Medium/short range the idea.

But there is no straight wall case mandate like other places.

.35 rem trimmed is popular.
So are the .358 wildcats.
Some folks even trim their .45-70's.
Of course .357 and .44 mags are super popular, since many do not reload.

AR guys do well with .458 Socom, .450 Bushmaster and .50 Beowolf like another poster mentioned. Seen a few AR's in .45 winmag.

For most it's a 200 yd max game. Guys with the .358 wildcats can almost double that.