I personally think you'd be fine feeding the smallest one, and just waiting a longer time between feedings. At that weight, you're probably close to when it's recommended to start feeding every 2 weeks rather than weekly. The other option is to just not feed and get smaller ones when you can, and in a few months or so, use the bigger ones. Jumbo rat weight starts around 275g. by the way.
Assuming it's a BCI, their guideline is to feed something that gives them a slight bulge, so watch how it looks.
This is the feeding info I used when I first got Ryuu and it worked out very well for him. You'll have to scroll down a bit: http://www.redtailboas.com/content/1...ew-online.html
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