am I starving my snake?

[Raven01]

164g snake x 0.1 = 16.4 gram prey to 164g snake x 0.15 = 24.6 gram prey.

So, you are feeding right in the middle of suggested prey weights as near as I can tell.
Personally, I think juveniles tend to lack the over-stuffed sausage look that you see.
Since juvies are growing so quickly I lean to the 5-7 day schedule rather than the 7-10 for adults.