For definitive info on M1903, M1903A3, and M1903A4 serial numbers and production history check the following references:
- The Springfield 1903 Rifles, Brophy
- Illustrated Guide to the '03 Springfield Service Rifle, Canfield
- The '03 Era, Campbell
- The M1903 Service Rifle, Poyer
Model 1903A3 production did not begin until December 1942 with qty 1909 rifles produced by Remington and qty 5540 produced by Smith-Corona. The fighting on Guadalcanal was finished in late Dec 1942/early Jan 1943, so there is virtually no possibility that M1903A3 rifles were used in combat there.
By the time the M1903A3 came into service most first-line combat units were armed with the M1 Garand,so it was largely used by second echelon and training troops. The old M1903s were heavily used by the Marines on Guadalcanal in 1942 and they also appear in photos of US Army troops early in the North african campaign which started in late 1942.
I've spent time in the field with the Marine Corps and have always admired their history and spirit. They have never lost a battle and are also renowned for their high casualty rates and "hey diddle-diddle, up the middle" frontal assaults. I think this is a tradition from amphibious operations were there were few tactical options, but to attack head on. Back in the bad old Cold War days, when we were squared off against the Russkie masses, we used to have discussions about the Marines (and the US Army for that matter) trying to be a bit more economical with their casualties and a bit more immaginative with their tactics in order to inflict higher casualties with less losses to themselves. The Airland Battle operational doctrine, which was developed in the early 1980s, addressed this issue and was a great leap forward.