I have a Hobbico compression gauge and I'm wondering what kinds of readings I should be getting on a .46 size engine.

I realize that engines will show different readings, however they all should roughly be in the same ball park. (.46FX)

What is the general area I should expect to see?

Also, does anyone have experience with the .12 and .15 size engines pertaining to compression.
I have 2 engines that I'm seeing 30psi on and cant tell if something is wrong with the gauge or how I am turning over the motor.
I'm using a starter box to test them and they both hit around 30psi.

Any thoughts ideas on using a Hobbico compression gauge would be appreciated

Dbow