Comments by "" (@neutronalchemist3241) on "Forgotten Weapons"
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@SidneyBroadshead The bullet was not unstable in flight and didn't have a wandering zero. Any spitzer bullet has the center of gravity displaced towards the back of the bullet, but that doesn't make it unaccurate.
The the aluminium tipped bullet was designed to be even more unstable, and so tumble more easily INTO THE BODY, not in flight. The Brits used the same trick in the .303 Ball MKVII, adopted in 1910, that served as standard issued cartridge through two World Wars, the Korean War and countless other smaller confrontations until the end of military use of the .303 British. Actually the Ball MKVII had a higher percentage of the bullet made out of aluminium, so was even more unstable, and none ever noticed it having a wandering zero. Today plastic tipped bullets are normally used for hunting.
The aluminium tipped bullet was also lighter than the original 6.5, so to have a faster muzzle velocity, and so a flatter trajectory in the first 300m of flight, so making the fixed 200m sight more useful.
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@heycidskyja4668 Fact is that there were practically two classes of service cartridges at the time. The "7-8mm, over 3000 joules energy at the muzzle" (30-06, 8mm Mauser, .303 British, 7.62X54r...) and the "6.5mm, from 2200 to 3000 joules energy at the muzzle" (Carcano, Arisaka and so on).
Modern service "intermediate" cartridges are below 2200 joules power, so it wouldn't be a problem, but practically all the cartridges proposed to solve the 5.56-7.62 dualism belong to the old "6.5mm 2200-3000 joules" category. So the problem. Are, IE, 6.8 SPC, or 6.5 Grendel, intermediate cartridges? They are made to be shot from an AR15 platform. But, power wise, they are in the "old service 6.5 rounds" category.
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