I bought a 100' roll of current Tri-X and it came with the "100 foot daylight load Kodak" reel.
Like would go into a 100' 35mm Arriflex hollywood movie camera. Makes bulk loading 100 foot rolls from 400 foot slow, but very doable. Music helps
I have a formica table in my darkroom that I use for film loading of all types. All you need is a roll long enough to getstart. I do 100 feet or so at a time.
Go slowly and methodically.