Reloading liability insurance ?

[Turnup]

Galeforce.

Since when have the authors of reloading handbooks sent their loads for proofing??
Tested in house in actual rifles, or more commonly Universal receivers to check pressures generated, certainly, but sent to a proof house for checking under CIP, don't think so.

Correct, there would be no point since such testing cannot prove that someone else's cases, someone else's primers, someone else's bullets and most of all someone else's production process will be in spec and safe. These things are NOT proven and cannot be assumed to be in proof until verified.