Maybe I missed something but is it possible to manually enter my target frame rate? My only options with 2x, 4x etc. either overshoot or undershoot 60 fps. Am I missing something dumb?
With the Experimental Algorithm you can do 3X/5X/7X that will get you closer to your ideal framerate, but it will produce more artifacts as well.
The correct way is to overshoot the target framerate and the option:
If FPS exceeds this value. Create another version with this fps
To lower the fps to 60
I figured out why I was having problems with this. I was importing png frames, interpolating them with step 2, but never actually clicking step 3. I would just import the image sequence right into premiere without converting to video. I was thinking the 60 fps version creation process happens during step 2 and couldn't figure out where the 60fps version was. Doh!