To compare apples with apples:
From the brochure on the C-27J website:
The C-27J Spartan | C27J
The C-27J has a range of 1000nm with 22046lbs of payload for logistics operations. Logistics operations have a MTOW of 70107lbs. The tactical take-off ground run of 1903ft, however, applies to basic operations which have a MTOW of 67241lbs. Thus for a 1903ft tactical ground run and a 1000nm transit, the max payload will be about 19200lbs.
A C-130J-30 with an identical 19200lb payload and fuel, including reserves, for a 1000nm transit would have a take-off weight of around 127000lbs. The max-effort take-off ground run for a C-130J-30 at 127000lbs is 1800ft,
100ft less that the C-27J with an equivalent payload.
Note that minimum field length (includes abort distance) for max-effort take-off for C-130J in that configuration would be around 2400ft. I can't find equivalent figures for the C-27J.
Simarly, the max landing weight of a C-27J is 60627lb. With an empty weight of 37500lbs, that means that max payload on landing with IFR fuel reserves would be around 20000-21000lbs. A C-130J-30 landing with IFR fuel reserves and a 21000lb payload would have a max-effort landing ground roll of around 1300ft compared to the C-27J's 1115ft. Not much in it.
Dems also the facts Col.
Beware the snake oil salesman.