If there are no barrel markings, take it to a gunsmith. Using a product called Cerro Safe, the smith can make a casting of the chamber. The casting is measured with a micrometer, and the dimensions compared to known cartridges.
100-400 USD
You will have to contact Remington.
Remington did not make a carbine in .44 Magnum caliber. They did chamber the Model 788 rifle in that caliber. Do you have a Ruger carbine in .44 Remington Magnum, or perhaps a Marlin in that caliber? sales@countrygunsmith.net
35 remington
284
Yes, Remington makes the 700 in that caliber.
Remington .270, 150 grain.
Remington
Have about 250 rounds of this UMC REM 30 ,,,,, 30 remington
The Remington Model 4 rolling block in .22 caliber with the serial number 353853 was manufactured in 1912. This model was produced from 1900 to 1935, and the serial number helps to pinpoint its production year within that range.
Your Remington model 1903-A3 was made in the year 1942.It was chambered in the caliber 30-06.
My research indicates about $300.00 in good condition, and that is for a model 4 in .32 long caliber.