Stimson's Breeding/Size Question

[Lolo76]

I have a pair of Stimson's Pythons, and I'm having trouble finding out specific breeding information for them (most materials on Antaresia only cover Children's or Anthill Pythons). The male is probably 4-5 years old and pretty chunky at ~600g, while the female is right around 3 years old but still only weighs 254g. So what is the minimum breeding weight for girls?

She's a good feeder, only refusing her f/t mice while in shed, but she can't seem to take anything larger than a hopper/weanling... I've offered small adults, and she'll bite on them for a minute before slithering away and leaving it. Should I keep trying to up the prey size, or just regularly offer 2 hoppers instead? And will she be ready to breed later this season? I'm anxious to make babies with these two, especially considering how gorgeous Veruca is!!