No.
no. The J C Higgins brand was not used until much later.
The ruger rifle
30 odd 6 .3006 of an inch same difference
The typical rifle bullet was .303 inch caliber. The same round was used in most of the light machine guns.
A British empire made rifle used during WW1, WW2 and still to be found & used in many, many countries. A very well made & dependable bolt action rifle with a 10 round magazine.
The most commonly used sniper rifle in the Marines is the M-40A3. It is a standard bolt action rifle with a Remington 700 action that fires the 7.62X51 NATO round.
A variety of rifles use the 7.62 Nato (.308) caliber bullet (not to be confused with the Soviet 7.62 used in many of the AK series of rifles, this round has a shorter cartridge length and is not compatible with rifles chambered for the imperial .308 round), while it has fallen out of favor as a main battle rifle round in western armies and was replaced by the 5.56 Nato round it is still used in specialized applications (sniping) and is used extensivly by hunters.
If you mean the SVD Sniper rifle manufactured by the Soviet Union, no, it is not a .50 caliber weapon. It fires a match grade version of the 7.62 X 54R cartridge- the same round used by the Moisin-Nagant 91/30 rifle (and the M38 and M44 Carbines). Wikipedia has a good concise article on the Dragunov sniper rifle. Enjoy.
CLP, same as what's used on any rifle.
Caliber is a measurement of the width of a bullet using the Imperial system. For example a .50 caliber round is 1/2 and inch wide, a .45 ACP round is .45 inches wide. The metric system is used in the same way, a 7.62 round is 7.62mm wide. Keep in mind these measurements are based on the physical bullet and not the casing as well. Rifle and assault rifle rounds typically have wider casings that bullets.
Your second year production BAR (1968) is going for 300 dollars in 60%original condition up to 600 dollars for one in mint 98% original condition.
steel was used in all the helmets however they were little good against stopping a rifle round even todays modern kevlar helmets can be penetrated by a ww2 era mauser rifle