I had a pair of aging jumbo rats that didn't produce, and ate all the dang rat food. I offered one to my 2600 g girl, and she was able to take it (with a resulting lump, and i didn't feed her again for 2.5 weeks). My 1100 gram "girl" (later sexed male, but i'm dealing with the seller) was unable to handle the other one, so it's frozen (by which i mean she constricted, killed, attempted to eat, and gave up after 45 minutes of trying to get her head around the rat's shoulders).
After the lump i saw in my *big* girl after eating that jumbo rat, i'm not sure i ever want to feed her something that big again. It seems like an awful waste of food, but i suspect i'll come across someone with a burmese or something who will enjoy the second rat.