There is a data sheet for "26650Fe3300" cells on FullRiver's web site which includes .5C charge and discharge curves.
Rated 1000 cycles. Charge .2C CC -> 3.6v -> .05C. Max discharge 1C.
(You are at their "max" drawing 23.1A from the 7P packs.)
I gambled and bought a few boxes myself as...