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The 6.5mm Creedmoor designated as 6.5 Creedmoor by SAAMI, and as 6,5 Creedmoor by the C.I.P. [4] is a centerfire rifle cartridge introduced by Hornady in 2007. [6]It was developed by Hornady senior ballistics scientist Dave Emary in partnership with Dennis DeMille, the vice-president of product development at Creedmoor Sports, hence the name.
In 2007, Hornady released the first 6.5mm Creedmoor Cartridge. The 6.5 Creedmoor was a joint development between former Marine Corps competitive shooter David Tubb and Hornady Ballistician David Emary. [12] Hornady Manufactures 6.5 Creedmoor cartridges, bullets and reloading dies.
6.5mm Creedmoor, 6.5×48 mm, introduced in 2007 6.5×47mm Lapua , a 2005 cartridge that fires the same diameter and weight 9.0g bullet as the 6.5×54mm but achieves a faster muzzle velocity 6.5×53mmR , the rimmed Romanian and Dutch service rifle cartridge from the 1890s through World War II
6.5 Creedmoor with a 1:8 twist, 24 in (61 cm) barrel, weighing 10.6 lb (4.8 kg) .243 Winchester with a 1:7.7 twist, 26 in (66 cm) barrel, weighing 11 lb (5.0 kg) A newer Ruger Precision Rifle "Gen 2" was announced on 6 May 2016 with several enhancements over the original. [ 4 ]
The 6.5 Grendel bullets have a true diameter of 6.71mm / 0.264" and the 6.5 Grendel case can be formed from abundant 7.62x39 cases with a neck re-sizing die, and fire-forming a slight change to the shoulder, if the case is made from brass. Many of the popular 7.62x39 cases are made from steel, which will not work for reforming the shoulder.
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In an article by the Precision Rifle Blog a survey of the top 100 shooters in the precision rifle series (PRS) showed that the 6.5 Creedmoor was on average 50 ft/s (15 m/s) faster than the 6.5×47mm Lapua. Although the 6.5×47mm Lapua is said to have superior brass quality compared to the 6.5 Creedmoor. [10]
8.6mm Blackout (8.6×43 mm), also sometimes referred to as 8.6 BLK, [1] is a centerfire rifle cartridge developed by the firearms manufacturer Q, LLC. [6] It utilizes a shortened case from the 6.5mm Creedmoor necked up to an 8.6 mm caliber (8.585 mm or 0.338 in diameter) projectile. 8.6 Blackout is designed for use in bolt-action rifles or as a caliber conversion for AR-10 style rifles.