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A new type of 4.5 inch gun with a longer 55-calibre barrel, it was designed in the 1960s for the Royal Navy's new classes of frigates and destroyers.The weapon, built by Vickers Ltd Armament Division, was developed by the Royal Armament Research and Development Establishment using the Ordnance, QF 105 mm L13 of the Abbot self-propelled gun as a starting point (it used electrical primers).
Fullbore target rifle (TR) is a precision rifle shooting-sport discipline governed by the International Confederation of Fullbore Rifle Associations (ICFRA). [1] TR uses single-shot rifles, usually chambered in .308 calibre, with circular "bullseye" targets at distances of 300–1000 yards.
The International Confederation of Fullbore Rifle Associations (ICFRA) is the international association for the fullbore rifle shooting sports of target rifle ('TR') (called 'Palma' rifle in the US) and F-Class, which are long range competitions shot at distances between 300 and 900 meters or 300 to 1,000 yards depending on the range. [1]
QuickLOAD is an internal ballistics predictor computer program for firearms.. For computations apart from other parameters, the cartridge; the projectile ()the gun barrel length
Closeup of chamber throat depicting relationship between freebore diameter, rifling groove diameter, and land diameter. The chamber is the rearmost portion of a firearm barrel that has been formed to accept a specific handgun/rifle cartridge or shotgun shell. [5]
In general, loads close to 100% density (or even loads where seating the bullet in the case compresses the powder) ignite and burn more consistently than lower-density loads. In cartridges surviving from the black-powder era (examples being .45 Colt , .45-70 Government ), the case is much larger than is needed to hold the maximum charge of high ...
At SAAMI maximum pressures, loads of this shot weight are already at or slightly below 1200 fps -- and they are a lot lighter than this supposed 3 oz. load. In fact comparing to Lyman's 2 oz. loads, it appears that for similar pressures the extra ¼ oz. costs about 20 to 60 fps (depending on powder burn rate, slower being better here.)
When the Dutch established the Dutch Cape Colony in the 17th century, they soon discovered their muskets were hopelessly inadequate against local game. Within a century the most popular Boer firearm was a flintlock smoothbore musket of about 8 bore with a 5 to 6 ft (1.5 to 1.8 m) barrel. [3]