FredC - Thanks for the mention of the 2004 Gun Digest article. Something worth looking for at future gun shows.

It would appear that perhaps no national team was "awarded" the Palma Trophy, in 1903, after the U.S. returned it.
It may have just been returned to the team that had last previously won it.

I guess some of the British barrels were custom made, but, followed official dimensions and rifling-twist.

p.s. - Heck, I splurged and bought a copy on ebay for $7, shipped.