Milton looks good and I'd say what you're feeding is probably just about right for him. I don't do a weight ratio type of feeding. We breed our own rats and quite honestly I just eyeball them and know which size rat fits which size snake. We feed a girth or slightly smaller than girth size prey every 7 days. Some of the bigger females are taking two a week as we approach breeding season.

Some feeding week I'll have to actually weigh prey but with 21 hungry mouths to feed...well there's just usually not enough time (plus chasing any escapee rats that hopped out of the scale bowl would not be so much fun LOL).