I attempted to have a set of .375/06IMP dies made by CH4D. I sent them 3 fired cases. The dies they sent to me, were for the
.375/06 Ackley IMP which has a .006" smaller shoulder than my chamber, not made from the cases I sent them.
This "change" not only overworks the cases and reduces the case capacity by about 4 or 5gr.
I returned the dies with another 3 fired cases, asking them to modify the dies to fit the cases I had provided.

They returned the dies untouched with a snide note asking if the gunsmith used a boring bar for cutting the chamber.
As well, both times, they kept the cases I sent.

Not very good service imho. I will never send them any 'work'.