I have yet to experience the "wall" and here's my theory which of course goes against some peoples thoughts.
Feed small and feed often

I feed nothing larger than 45 grams to any of my under 1000 gram snakes and prefer to feed 25 to 35 gram rats 2 or 3 times a week depending on the size of female I'm feeding.
All 5 of my sub-adult females bust through the 1000 gram "wall" and never looked back.
Males don't apply to the 1000 gram wall, it's an exclusive club for females