I wouldn't send it to them unless:
1. They tell you the spec, you measure your gun and it doesn't meet their spec.
2. They refuse to tell you their spec leaving you no options other than to live with it or send them the gun for evaluation.
Let's look at option 1. They know what their spec is, they know how they measure it. Therefore they can tell you what it is and how they measure it. If it doesn't meet spec, you can send them the gun with confidence that any shipping costs will be reimbursed under warranty.
Option 2. If they won't tell you the spec and how they measure it, then they are forcing you to live with a potentially defective gun (unacceptable) or are forcing you send them the gun for evaluation. If the only acceptable option they have left you is to ship them the gun then they should cover the shipping costs up front.
Assuming that the measurements are properly made (which isn't a given), 0.015" might be ok, but 0.03" is pretty bad. The fact that it varies by a factor of 2 across the various chambers is even worse. Did you give them those numbers?