TMAX 400 120 film pushing

Help!

Can anyone let me know the best way to develop TMAX 400 120 pushed to 1600? Am very confused. The Massive Development chart says 8.5 minutes at 20 but the Kodak Dev Sheet says 10 minutes.

Can anyone please let me know the best

developer for pushing to 1600

time for devlopement

agitation?

many many thanks!

Trust Kodak. They know what they are talking about.

Xtol.

Agitation? Start at once every minute for ten seconds, see if you like the mid-tones and highlights. Adjust as needed.