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Rifles, Reloading, Optics, Equipment
Reloading
Body sizing? A necessary step?
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<blockquote data-quote="Bart B" data-source="post: 519885" data-attributes="member: 5302"><p>Kevin, all's fine with me. And regarding what can be done to make very accurate ammo may well best described as how several thousand rounds of .308 Win. ammo was made using two Dillon 1050 progressives back in 1991. </p><p></p><p>One machine resized new Winchester brass (with near 4 grains weight spread) case necks so they would be perfectly round and hold the then new Sierra 155-gr. Palma bullet as well as seat the Fed. 210M primers. The second machine metered 45.3 +/- almost 2/10ths grains of IMR4895 and seated the bullet. 20 rounds were randomly selected for testing. Bullet runout was up to 3/1000ths inch. They were to be fired in a standard SAAMI spec chamber except for the throat being a bit shorter for the Palma bullet to just touch the lands when the 2.800 inch OAL round was chambered.</p><p></p><p>All 20 went inside 2.8 inches at 600 yards from the Win. 70 Palma rifle in Bob Jensen's machine rest. Several top long range shooters from around the world said that ammo was definitely 1/2 MOA stuff at 600 across a variety of bore, groove and chamber dimensions. Compare this to what the many-group aggregates in benchrest 600-yard matches.</p><p></p><p>Even mass produced ammo with new cases can shoot very well indeed.</p></blockquote><p></p>
[QUOTE="Bart B, post: 519885, member: 5302"] Kevin, all's fine with me. And regarding what can be done to make very accurate ammo may well best described as how several thousand rounds of .308 Win. ammo was made using two Dillon 1050 progressives back in 1991. One machine resized new Winchester brass (with near 4 grains weight spread) case necks so they would be perfectly round and hold the then new Sierra 155-gr. Palma bullet as well as seat the Fed. 210M primers. The second machine metered 45.3 +/- almost 2/10ths grains of IMR4895 and seated the bullet. 20 rounds were randomly selected for testing. Bullet runout was up to 3/1000ths inch. They were to be fired in a standard SAAMI spec chamber except for the throat being a bit shorter for the Palma bullet to just touch the lands when the 2.800 inch OAL round was chambered. All 20 went inside 2.8 inches at 600 yards from the Win. 70 Palma rifle in Bob Jensen's machine rest. Several top long range shooters from around the world said that ammo was definitely 1/2 MOA stuff at 600 across a variety of bore, groove and chamber dimensions. Compare this to what the many-group aggregates in benchrest 600-yard matches. Even mass produced ammo with new cases can shoot very well indeed. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Body sizing? A necessary step?
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