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Rifles, Reloading, Optics, Equipment
Reloading
30-338 winchester magnum
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<blockquote data-quote="Bart B" data-source="post: 365584" data-attributes="member: 5302"><p>A blown out '06 case may do that, but the ones I saw back in the 1960's and 1970's didn't. Their powder column was too small in diameter for its length, and that's one reason why the .308 Win. trumped the .30-06 for most high power rifle matches in the mid 1960's.</p><p></p><p>I've worn out three .30-.338 barrels shooting matches. That round (and the .308 Norma Mag.) may be the best compromise for long range accuracy, wind bucking and ease of shooting accurate at longer ranges in 30 caliber. But the 26 caliber ones are better these days as great match bullets are finally available for them. Sierra Bullets gave me a couple hundred of their then new 140-gr. HPMK .264 bullets to test in my .264 Win. Mag target rifle in the late 1960's. They shot 2 feet at 1000 yards. The Norma 139's I normally used would shoot just under 10 inches.</p><p></p><p>Here's an example of what my current barrel does with 190's in unprepped once fired full length sized cases and 200's in unprepped new cases shot alternately at 1000 yards. This is the plot I made of where the bullet holes were spotted at:</p><p><img src="http://i735.photobucket.com/albums/ww351/BartBob/30at1000.jpg?t=1266864898" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Black dots at the top of the 10-inch X ring are 190's, bottom red ones are 200's. I first fired a shot with each to zero. One shot fired about every 25 to 30 seconds, a 190 followed by a 200, then a 190 and so on. I shot 'em that way to see if anything changed accuracy wise with the barrel heating up and fouling. A standard chamber with SAAMI specs for the .338 Win. case body and shoulder was used.</p><p></p><p>It was interesting that the 200's centered a bit below the 190's and both 15-shot groups with each bullet weight are about the same size. That old Winchester 70 action's got some life left in it yet.</p></blockquote><p></p>
[QUOTE="Bart B, post: 365584, member: 5302"] A blown out '06 case may do that, but the ones I saw back in the 1960's and 1970's didn't. Their powder column was too small in diameter for its length, and that's one reason why the .308 Win. trumped the .30-06 for most high power rifle matches in the mid 1960's. I've worn out three .30-.338 barrels shooting matches. That round (and the .308 Norma Mag.) may be the best compromise for long range accuracy, wind bucking and ease of shooting accurate at longer ranges in 30 caliber. But the 26 caliber ones are better these days as great match bullets are finally available for them. Sierra Bullets gave me a couple hundred of their then new 140-gr. HPMK .264 bullets to test in my .264 Win. Mag target rifle in the late 1960's. They shot 2 feet at 1000 yards. The Norma 139's I normally used would shoot just under 10 inches. Here's an example of what my current barrel does with 190's in unprepped once fired full length sized cases and 200's in unprepped new cases shot alternately at 1000 yards. This is the plot I made of where the bullet holes were spotted at: [img]http://i735.photobucket.com/albums/ww351/BartBob/30at1000.jpg?t=1266864898[/img] Black dots at the top of the 10-inch X ring are 190's, bottom red ones are 200's. I first fired a shot with each to zero. One shot fired about every 25 to 30 seconds, a 190 followed by a 200, then a 190 and so on. I shot 'em that way to see if anything changed accuracy wise with the barrel heating up and fouling. A standard chamber with SAAMI specs for the .338 Win. case body and shoulder was used. It was interesting that the 200's centered a bit below the 190's and both 15-shot groups with each bullet weight are about the same size. That old Winchester 70 action's got some life left in it yet. [/QUOTE]
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30-338 winchester magnum
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