Dan Brown states in the author's note at the beginning of the book that, "All technologies described in the novel exist."
FMJ
Could you be a little more specific? There are lots of rifles considered large caliber, therefore there are all sorts of ammunition.
The 7.62x59 ammunition is a surplus ammunition used in the Mosin Nagant
Any automatic and most rifles
Paintball sniper rifles are sold anywhere ammunition and gun supplies are sold. Walmart carries paintball rifles and accessories as well in most of their stores.
The correct ammunition is 30-06 Springfield.
H. Ommundsen has written: 'Rifles and ammunition and rifle shooting'
Some examples of military weapons and ammunition include rifles, pistols, machine guns, grenades, missiles, and artillery shells.
Remington makes a variety of rifles and shotguns using various sizes of ammunition.
Single shot, bolt action, pump, semi-auto,
The biathlete carries a small bore rifle, which weighs at least 3.5 kilograms (7.7 lb), including ammunition in magazines on her/his back during the race. The rifles use .22 LR ammunition and are bolt action or Fortner (straight-pull bolt) action.
They can be divided by caliber, by type of ammunition, by use, or by type of action. That gives several hundred combinations.