A couple of hundred meters.
Muzzle loader or centerfire?
It depends entirely on the muzzle velocity of the weapon you are using. The higher the muzzle velocity the farther the projectile will travel.
Depending on the type of gun used they can shoot in excess of 1000 yards. Most rifled muzzle loaders are accurate up to 300 +/- yards. Muskets, or guns without rifling are able to shoot accurately to about 150 yards +/- though longer shots have been recorded in all cases, the guns used were designed for long range shooting. There is a wealth of information available at the long range muzzle loader forum posted in the related links section of this answer.
To retain enough muzzle energy to kill a deer size game animal,I keep the 30-30 Win.cartridge to within 175 yards for all my shots.
some shoot far and some dont so they all dont shoot the same length
Very far
Type of action has nothing to do with how far a weapon will shoot. Caliber and load is what matters.
how far does a 50 caliber sniper rifle shoot accuratly
Which .50 cal, and do you mean .357 Magnum? If you're comparing the .50 AE to the .357 Magnum, the .50 AE is more powerful, by far.
About 1" past the muzzle.
yes
ALOT!