I have some basic questions about Stevens-Pope barrels for Krags.  They were made as gallery barrels in 22 rimfire and as target barrels in 30/40. 

#1: How many of each were made? 

#2: When were they sold?

#3: Were they numbered? 

#4:  If they were numbered, was the numbering series different than the Stevens-Pope series for single shots?

#5:  How many were purchased by "National Guard" units in PA, NJ, Ohio & Washington State?

#6:  Did any of the converted "National Guard" rifles retain Stevens-Pope barrels after Chief of Ordnance Crozier ordered that they all be returned to service rifle condition?

#7:  What 22 rimfire cartridges were they chambered for?

My questions were brought about by a friend's loan to me of a Model 1898 Gallery Practice Rifle, one of the very first ones produced by Springfield.  That rifle is chambered for 22 Extra Long, with a .226" groove diameter and 18" twist.  I began a bit of research as to why & how the GPR came about.  My references are the Brophy and Poyer books on the Krag, a 1st edition of Smith's book on Pope barrels and both of Campbell's Winchester Single Shot books. Here is what I have learned so far:

In 1900, the State Militia and State Guard units were armed with both the Trapdoor and the Krag. Each state had its own semi-autonomous organization.  Some $$ were received from the Militia Bureau. There was no "National Guard" until 1916, but I will use "NG" as an acronym.  Very little $$ were available for marksmanship training or ammunition.  Many units had little access to military rifle ranges.  The Model 1896 Gallery Practice Cartridge (.30 cal round ball) was so inaccurate that many NG training officers would not use it. 

In 1900, military smallbore shooting was brought to the US from England. The advantages for training were obvious & some NG marksmanship instructors got rifles & developed indoor ranges. About 1901, Harry Pope had designed an accurate 22 rimfire barrel for the Krag.  Stevens saw a market and the Stevens-Pope barrels were produced.  The barrels were bored eccentrically, with the bore in the center at the muzzle but at the 12:00 position at the breech, so that Krag bolt & extractor could be used.  The barrel was designed so that any gunsmith or NG company armorer could turn an issue Krag into a gallery training rifle.

NG Inspectors of Musketry for Ohio (Charles Winder), PA, NJ and Washington State purchased multiple barrels in 1901-1904.  How many I do not know.  My guess is at least 200 to 400 barrels, issued at about 5 per company.

The rifles produced immediate results.  Marksmanship scores increased and galley shooting with the Krag became popular.

Brophy's 28-inch twist and a Stevens catalog saying that Long Rifle cartridges are OK does not work for me.  My Winchester Winder Musket is chambered for 22 Short and has a 26" twist.  Long Rifle cartridges do not shoot accurately at ranges beyond 25 yards in my rifle.

Peters marketed a 22 rimfire labeled "Stevens-Pope Armory" cartridges. A photo of one of the cartridges looks a lot like a 22 Long Rifle.  Winchester marketed a "U.S. Armory Gallery Practice Cartridge".  All that makes me think that a slightly quicker twist, maybe 18" was used.

Pope left Stevens about 1905 and that pretty much killed off the Stevens-Pope marketing efforts.  About the same time, Winchester brought out their rimfire Musket with Krag sights.

Very interesting information!!
Thank you for posting it!

You can add another to your list. This one has been buried in a former California collector's estate for decades; the gentleman's heir sold it to me a few years ago. His father had put together an impressively diverse collection of Springfield Armory guns during the 1960s and 70s. Some were accompanied by dad's DCM bills of sale dated in the 1960s, but not the Krag.

This Stevens-Pope barreled .22 Krag is an 1898 model in the 302-thousand serial range with a 1901 stock cartouche. It looks like any other model 1898 except for the oversized dovetail based front sight. If there is a number on the barrel it must be concealed under the wood somewhere.