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To make the 6.5×68mm an awesome long-range cartridge, rifle barrels with a 200 mm to 230 mm (1 in 7.9 to 9 inch) twist rate are a better choice. Due to the large case capacity in relation to the 6.5 mm (.264 inch) caliber bore size the 6.5×68mm is very harsh on barrels. The 6.5×68mm typically wears out a rifle barrel in 500 to 1000 rounds.
In C.I.P. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum C.I.P. pressure to certify for sale to consumers. This means that 8×68mm S chambered arms in C.I.P. regulated countries are currently (2014) proof tested at 550.00 MPa (79,771 psi) PE piezo pressure.
A 6 bore cartridge rifle built by W.W. Greener in 1891 for a southern African trekker called Viljoen, fired 1,750 gr (113 g) bullets at 1,550 to 1,600 ft/s (470 to 490 m/s). Three types of ammunition were supplied, hardened lead for elephants and rhinoceros , slightly hardened lead for buffalo , and pure lead with a copper tube hollow point for ...
January 6, 2025 at 12:49 PM Jennaleah “Jenna” Hin, 17, of Henderson, Nevada, was reported missing since Dec. 30 after she reportedly left home following a family dispute
FILE - Green Bay Packers General manager Brian Gutekunst chats before an NFL football game against the Houston Texans, Oct. 20, 2024, in Green Bay, Wis. (AP Photo/Jeffrey Phelps, File)
South Korea's acting President Choi Sang-mok on Monday ordered an emergency safety inspection of the country's entire airline operation as investigators worked to identify victims and find out ...
RPK-6 Vodopad (Russian: РПК-6 Водопад, "waterfall") is a Soviet 533 mm anti-submarine missile deployed operationally since 1981. [1] RPK-7 Veter (Russian: РПК-7 Ветер, "wind") is a 650 mm version, deployed operationally since 1984. [1] Both missiles are given the same United States Navy designation SS-N-16 and NATO designation ...
The USDA reported that US egg production dropped 4% year over year, totaling 9.19 billion in October 2024. The bird flu caused the loss of 2.8 million egg-laying birds in Utah, Washington, and ...