What do you use?
Well... you asked!:
Canson Rag Photographique 310gsm
Canson Edition Etching Rag 310gsm
Canson BFK Rives Rag 310gsm
Canson Montval Aquarelle 310gsm
Canson Arches Aquarelle Rag 310gsm
Canson Platine Fibre Rag 310gsm
Canson Baryta Photographique 310gsm
Canson Photo Satin Premium RC 270gsm
Hahnemühle Photo Rag 308gsm
Hahnemühle Bamboo 290gsm
Hahnemühle Museum Etching 350gsm
Hahnemühle William Turner 310gsm
Hahnemühle Photo Rag Baryta 315gsm
Harman by Hahnemühle Gloss Art Fibre Warmtone 310gsm
Hahnemühle Monet Canvas 410gsm
Awagami Unryu 55gsm
Awagami Kozo (natural & white) 70 & 110gsm
That is what we use almost daily.
Yes, I know that is a crazy amount of paper to offer and to have in stock on different sizes. I also know that some papers on the list are similar and we could use only one, but some clients demand specific papers and... well, i am a paper maniac!
With all that variety of papers and 6 to 12 paper changes per day I never had a loading problem as you describe. Actually, now that you made think about it, I never had a loading problem with the IPF8400 in six months of use, and it was one of my biggest fears before buying it due to the curved paper path.