No reference for a savillion rifle. If you mean civilian, same as for a military rifle- it will depend on the caliber and barrel. Military rifles in the US are made by civilian companies.
.44 henry rimfire
Rifles are mostly 5.56 and handguns are 9mm. There are other calibers that are used, but those are the most common.
which Springfield? The military arsenal, or the civilian company?
FN made hundreds of different caliber rifles, pistols & shotguns both military & civilian. Need more info. Be specific.
Several dozen different rifles- it is a very popular caliber for hunting, target shooting, and military use,
It is the caliber of the cartridge used by Great Britain for many years in their military rifles. It is a rimmed cartridge.
The M16 rilfe used by the US military is caliber 5.56mm x 45mm. This is SIMILAR to, but not exactly the same as the .223 cartridge. The civilian variations of the AR-15 style rifles are in several calibers including 7.62 NATO and 7.62 Soviet
Due to demands of the war, very few civilian firearms were made in England in 1944. Makers were producing the .303 caliber #4 Mk1 rifle, and the #5 Carbine. A small number of the SMLE rifles were converted to .22 rimfire weapons (military trainers). Search Wikipedia for the term SMLE for some good information.
"No, 7.92 is German military caliber for WW 2 and earlier Mauser rifles." Actually, 7.92x57 is the same thing as the 8MM Mauser, if that's what the person was asking.
Terni was the national armory for Italy, and made rifles in 3 different calibers. 6.5mm, 7.35mm, and 8mm Mauser. You will need a gunsmith to examine yours to tell you what caliber. Some military surplus rifles were rechambered to other calibers.
Most military-based civilian assault rifles go for around $1,000 to $2,000 USD. It depends on where you're looking for an M4A1.