Just about every firearms maker has made one. Talking about dozens upon dozens of makers and models.
All the multiples of 762 (which are infinite). Starting with these: 762, 1524, 2286, 3048, 3810 . . .
NO.
Might be a replacement barrel. DO NOT FIRE until a gunsmith checks it out
Yes
They had a lot higher rate of fire.
70 percent of 762 = 533.4 70% of 762 = 70% * 762 = 70%/100% * 762 = 5334/10 = 533.4
762 as a percent:762 x 100% = 76200%
A fire involving rifles a rifle fires a projectile at very high velocity
When compared to early rifles, present day rifles are smaller, lighter, less expensive, more accurate, have a greater range and fire much more quickly.
The M1891, 91/30, M38, M91/56, M44, and all the Finnish variants all fire the 7.62 x 54mm Rimmed cartridge. Usually known as 7.62x54R, or 7.62 Russian. The only Mosin Nagant rifles which fire a different cartridge are the M1891 rifles captured by the Austro-Hungarian Empire during the First World War. These were converted to fire the 7.92x57 cartridge, and are extremely rare.
It is: 417+345 = 762
152.4