Quote Originally Posted by RixStix View Post
Yes, those are the settings.
Given that, it looks like the USPS rounds anything up to the next ounce. That is how printing postage works.
So obtaining a quote for anything between 15.001 and 15.999 will be rounded to 16 ounces by the USPS and invalidated for first class use because 16 ounces exceeds the spec for 1st class ????

That's fine if it works that way. I won't loose any sleep over that and surely do not expect you to either.

I just found out that the 13-15.999 ounce rate has been available to CPP users for a while but Stamps.com conveniently disables it.

I tried use on Small/Medium Tare: 0:0.087

Which does work, but how does this affect other things?