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Rifles, Reloading, Optics, Equipment
Reloading
5 or 3 shot group when determining ES/SD???
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<blockquote data-quote="Bart B" data-source="post: 625833" data-attributes="member: 5302"><p>In three decades of shooting high power rifle matches, I never developed a single load, except one. All I did was use the same components as the winners and record setters use and put the same charge weight in the cases as they do. All my .308 Win. and .30 caliber magnum barrels have shot my handloads inside 1/2 MOA through 600 yards and inside 3/4ths MOA at 1000. </p><p></p><p>The only one I developed was when part of a group of top classified long range competitors working up a load for Sierra's new Palma bullet in 1991. We all just happened to get best accuracy with 45.5 grains (metered to 3/10ths grain spread) of IMR4895 with a Fed. 210M match primer igniting it in brand new Winchester cases. 20 rounds picked at random from the production lot of a couple hundred thousand rounds tested 2.7 inches at 600 yards. Later that year when several top long range shooters from around the world in a 5-day long range match shot that ammo in all sorts of rifle barrels, they all said it was definitely half MOA ammo at 600 yards. Not too shabby for ammo with 3 thousandths bullet runout and new, unprepped virgin brass.</p><p></p><p>PS: Oops, there was one other load I developed from scratchg. Sierra Bullets said I should use about 72 grains of H870 in a .264 Win. Mag. long range match rifle shooting Norma match bullets. I tried 71, 72 and 73 grains for 10 shots each at 1000. 72 grains did it.</p></blockquote><p></p>
[QUOTE="Bart B, post: 625833, member: 5302"] In three decades of shooting high power rifle matches, I never developed a single load, except one. All I did was use the same components as the winners and record setters use and put the same charge weight in the cases as they do. All my .308 Win. and .30 caliber magnum barrels have shot my handloads inside 1/2 MOA through 600 yards and inside 3/4ths MOA at 1000. The only one I developed was when part of a group of top classified long range competitors working up a load for Sierra's new Palma bullet in 1991. We all just happened to get best accuracy with 45.5 grains (metered to 3/10ths grain spread) of IMR4895 with a Fed. 210M match primer igniting it in brand new Winchester cases. 20 rounds picked at random from the production lot of a couple hundred thousand rounds tested 2.7 inches at 600 yards. Later that year when several top long range shooters from around the world in a 5-day long range match shot that ammo in all sorts of rifle barrels, they all said it was definitely half MOA ammo at 600 yards. Not too shabby for ammo with 3 thousandths bullet runout and new, unprepped virgin brass. PS: Oops, there was one other load I developed from scratchg. Sierra Bullets said I should use about 72 grains of H870 in a .264 Win. Mag. long range match rifle shooting Norma match bullets. I tried 71, 72 and 73 grains for 10 shots each at 1000. 72 grains did it. [/QUOTE]
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Reloading
5 or 3 shot group when determining ES/SD???
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