The Stevens-Pope barrels, that the U.S. team used in 1903 at Bisley, had a rifling twist-rate of 1 turn in 8 inches.
(Springfield Armory 'Issue' Krag barrels were 1 turn in 10 inches).

The Steven's-Pope barrels improved stability of the custom 220 grain projectiles at 1,000 yards.

In 1903, 'Issue' U.S. Krag ammo was a handicap for long range shooting.
"Whistler & Aspinwall - .30" propellant was sensitive to changes in temperature and humidity.
The Government 220 grain projectile was a poor performer.
An improved (Hudson-Thomas designed) 'windbucker' 220 grain projectile was used by the U.S. team at the 1903 Bisley 'Palma Match'.

The U.S. team won the match, but, the results were voided and the trophy returned to the custody of the previous year's winner, (Britain-1902 - at Ottawa), to be competed for at the next future match.
There was no default 1903 winner. Most of the teams had custom barrels and tweaked their ammo, but, only the U.S. Team's barrels changed  their country's standard rifling grooves and twist. (This was a clear 'rule' violation).

(IMHO - The Palma Trophy of 1903 should have gone to the French, firing Berthier rifles with horrible sights, or the Norwegians, who fired their 6.5X55mm Krags "offhand")!

Possibly, one of the illegitimate U.S. Krags of 1903 is in the NRA-Museum in Virginia.

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