SRS Search on M1903 please

[Cosine26]

I have researched my resources and find the following information which may add to your knowledge of your rifle.
During the 1920's the US became very active in the International rifle matches and Congress appropriated special funds to further this interest. There were several experiments made to make the M1903 rifle competitive in this field. During this period exact records may or may not have been kept, so documented information may be difficult to identify. There are several people who have better source material that I , so I shall defer to them for more detailed or accurate info.
There is a good article in the U.S. Martial Arms Collector, issue No. 133 and additional information in Brophy's book. Your rifle has several characteristics which makes it similar if not one of the original International Match (IM) rifles. The article indicates that there were fifty IM rifle manufactured in various configurations having both Remington and Winchester barrels. There is also mention of one with a Pope barrel. Most of these rifles follow in the 125XXXX serial number range, but there is one illustrated, in the article, that falls in the 126XXXX range with a Remington barrel that falls within 3255 numbers of your rifle. Brophy indicates that during the development of the IM rifles, a number of NM M1903 were being manufactured. Your rifle has some of the characteristics of the IM Rifles but differs in others.
At one time the DCM offered some of the used Heavy Barrel rifles for sale and here are the cited references from the American Rifleman Magazine:
"Heavy Barreled Rifles Available
Further research shows that in the January 1927 issue of the AMERICAN RIFLEMAN magazine, in the DCM section the following ad appears:
“A few U. S. Rifles Model of 1923, heavy barrel International are available for sale through this office. The rifle costs $85.00 plus $1.34 packing charges. It has the service action, heavy barrel, 28 or 30 inches in length, as desired, style NRA pistol grip stock without grasping grooves, and fitted with Model 1922 butt plate. It is equipped with the Lyman 48C receiver sight, and the Winchester Globe front-sight. The rifles are not equipped with set triggers or palm rests. Such additional work will not be done at the Armory, but if desired by the purchaser, they must make arrangements to have the set-triggers and palm rests made by a concern making such equipment. This is the type of rifle used by the International Team."

At one time, the Armory sold off a few USED International “FREE” rifles. In those days, the corrosive primer ruled supreme, and HiVel #2, a nitroglycerine based powder was much more uniform than the available IMR powders of the day. It was much more erosive than the IMR powders. International rifles were fired much more than the average rifle for the course of fire was 120 rounds and shooters tended to practice every day if possible. Barrels wore out due to throat erosion fairly rapidly."
Your rifle may be one of those.
As to the "straight handled bolt". a limited "J5" bolts had were DHT . According to VI's chart, these will have "J5" stamped on the bottom of the safety lug.

Hope this helps.