Mag., essentially the same cartridge with a shoulder slightly further forward and a shorter neck. Five years later Winchester introduced their. 338 bullet, Roy Huntington receives credit for being the first to reduce the. Introduced by Winchester in 1958 as a shortened and blown-out (to remove the case taper and increase volume). was the darling of Long-Range competition for a while, but before Winchester introduced it in 1963, competitors were already shooting it as the. “Big Blue” never keyholed at 1,000 yards and I recorded 20-round match scores in the 190s. 30-338 Magnum rifle I called “Big Blue” was a 200-grain SMK, 67-grains of IMR 4350 and Federal 210M primer on a necked-down Winchester. Mugu rifle competition team from 1988-1990, to confirm my recollection that my load then for the. That prompted me to dig out my old data book from my days on the Navy’s Pt. going subsonic and “keyholing” at 800 yards. Navy Match Rifle Team back in 1988 found the 180-grain Sierra MatchKing (SMK) bullet in the. The article includes an interesting statement that the U.S.
300 Winchester Magnum into the Mk 248 MOD 1 cartridge used by American snipers today. The June 2017 American Rifleman includes a well-researched article by Aaron Carter on the military perspective of evolving the. 30-338 competitive at 1,000 yards with 200-grain bullets while the Navy struggled to make the. Above: The author's nearly 30 year-old data book shows the.
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