For a .50 BMG rifle, $3000 and up, with $3000 being just for a basic, bolt action single shot model.
Yes, I can. A Barrett M107 is a .50 caliber sniper rifle.
About 50 USD
Depends on the application. If you mean power, the higher the caliber, the more powerful it is. for example, a .22 caliber rifle is much less powerful than a .50 caliber rifle.
50 caliber
50- 175 usd
Typically 50 to 75 grains of ffG powder.
50-100 USD
200-10000 USD depending on EXACTLY what you are referrring to.
50-150 dollars.
Yes
$50-$150, depending on model and condition.
Any bullet that has a diameter of one half inch is a .50 caliber bullet. There are different .50 caliber bullets- my Hawken muzzle loading rifle shoots a .50 caliber lead bullet, but different from the .50 Browning Machine Gun (that is also used in the .50 Barret sniper rifle)