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A bullet can be made of virtually anything (see below), but lead is the traditional material of choice because of its high density, malleability, ductility, and low cost of production. However, at speeds greater than 300 m/s (980 ft/s), pure lead will melt more and deposit fouling in rifled bores at an ever-increasing rate.
Since lead is a very dense material, bullets made of inexpensive, non-toxic materials will be lighter than bullets made of lead unless bullet length is increased. Inferior external ballistics cause lighter bullets to be less effective against distant targets. Increasing bullet length may require a faster rifling twist to maintain stability.
It is a conventional lead core FMJ bullet, developed for accuracy. SP-5UZ – The SP-5UZ (СП5-УЗ) is an SP-5 variant with an increased charge intended for a factory-specific strength testing of the weapons. SP-6 (7N9) – The SP-6 (СП-6) was developed by Yuri Frolov. It has a hardened metal armor-piercing core. It can penetrate 2 mm (0. ...
The 5.45×39mm cartridge is a rimless bottlenecked intermediate cartridge.It was introduced into service in 1974 by the Soviet Union for use with the new AK-74.The 5.45×39mm gradually supplemented and then largely replaced the 7.62×39mm cartridge in Soviet and Warsaw Pact service as the primary military service rifle cartridge.
Monolithic bullets have been used for hunting big game in the USA for decades. The first popular all-copper bullet was the Barnes X bullet in 1986. [7] Since then, most bullet companies have a monolithic bullet on the market, including Nosler E-tips, Hornady GMX, Barnes TTSX, LRX, VOR-TX, Federal Trophy Copper, Winchester Powercore 95/5, Hammer bullets, Cutting Edge Bullets, Lehigh Defense, G9 ...
In 2008 factory loaded .408 CheyTac 420-grain (27.22 g) lead core bullets with 955 copper jackets became available. The very-low-drag bullets are made by Rocky Mountain Bullets in Philipsburg, Montana and have a rebated boattail and a claimed ballistic coefficient (G1 BC) of 0.874.
The size of the lead shot that is produced is determined by the diameter of the orifice used to drip the lead, ranging from approximately 0.018 inches (0.46 mm) for #9 lead shot to about 0.025 inches (0.64 mm) for #6 or #7.0 shot, while also depending on the specific lead alloy that is used.
Loaded ammunition in the 300 BLK caliber can be purchased as light as 100 gr, with the 125 gr class of bullets proving to be popular when shooting at higher velocities. However, to use a bullet that has a weight near 125 gr at supersonic velocities, the .277 caliber has a much more ideal shape for stability and accuracy (longer and slimmer ...