RE: 7.62x54R cartridge
The 7.62X54R has been around a long time and even so, quality factory loads are a bit tough to find. Military surplus is readily available at most gun shops. They have also been manufactured in other countries besides Russia, such as Poland, and China. In good condition they shoot pretty well off the rack, but can be customized to fit the shooter with aftermarket synthetic stocks, bolt handles and scope mounts. If you want the best accuracy you can get from the rifle. I suggest loading your own ammo, but be sure to get reloadable brass as most of the military ammo can't be reloded.
"Fast is fine, but accurate is final". "Wild Bill" Hickok - 1869