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Rifles, Reloading, Optics, Equipment
Reloading
Need some advice
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<blockquote data-quote="AJ Peacock" data-source="post: 270836" data-attributes="member: 4885"><p>First of all,</p><p></p><p>Ackley Man, you nearly made me spew coffee when I read your post (which I agree with for the most part).</p><p></p><p>As far as the original poster, buy the following book, read it 3 times and then ask your question again <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p><a href="http://www.zediker.com/books/handloading/hlmain.html" target="_blank">Zediker Publishing</a></p><p></p><p>I own some very very very accurate rifles (more accurate than I can shoot them on most days). I haven't been able to quantify many of the 'specialty' processes that are discussed on here. The one process that appears to make a small difference to me on my 7mmRM is sorting brass by weight/volume. Here is what I did and how I verified that it made a small difference to my rifle.</p><p></p><p>1) shoot all the brass in a lot one time.</p><p>2) prep the brass in the entire lot (100 brass). Primer pockets in and out, trim to a common length (all square), in/out chamfer.</p><p>3) Sort the prepped brass by weight. I then verified that the volume WAS related to weight in my batch of Norma brass. I verified by weighing the amount of water that the heaviest 10 brass and the lightest 10 brass would hold.</p><p></p><p>I then worked up a very accurate load using RL 22, 162gr Amax. with the heaviest (least volume) 20 brass. The same load in the lighter (larger volume) brass shot a little less velocity and correspondingly to a slightly (1/2 moa or so) different POI.</p><p></p><p>Before everyone starts screaming that it doesn't matter. It may not matter with any other rifle / load / shooter combo in the world; but it DID make a small difference in my test.</p><p></p><p>What did I do about it? I keep the brass sorted by weight and simply verify my POI with the ammo I'm using before I go hunting. I shot this rifle 6 times this year, 3 times over a chrono to verify velocity and 3 times at 200yds to verify POI. The group at 200yds measured .362" (I don't think I had coffee that morning).</p><p></p><p>HTH,</p><p>AJ</p></blockquote><p></p>
[QUOTE="AJ Peacock, post: 270836, member: 4885"] First of all, Ackley Man, you nearly made me spew coffee when I read your post (which I agree with for the most part). As far as the original poster, buy the following book, read it 3 times and then ask your question again :D [URL="http://www.zediker.com/books/handloading/hlmain.html"]Zediker Publishing[/URL] I own some very very very accurate rifles (more accurate than I can shoot them on most days). I haven't been able to quantify many of the 'specialty' processes that are discussed on here. The one process that appears to make a small difference to me on my 7mmRM is sorting brass by weight/volume. Here is what I did and how I verified that it made a small difference to my rifle. 1) shoot all the brass in a lot one time. 2) prep the brass in the entire lot (100 brass). Primer pockets in and out, trim to a common length (all square), in/out chamfer. 3) Sort the prepped brass by weight. I then verified that the volume WAS related to weight in my batch of Norma brass. I verified by weighing the amount of water that the heaviest 10 brass and the lightest 10 brass would hold. I then worked up a very accurate load using RL 22, 162gr Amax. with the heaviest (least volume) 20 brass. The same load in the lighter (larger volume) brass shot a little less velocity and correspondingly to a slightly (1/2 moa or so) different POI. Before everyone starts screaming that it doesn't matter. It may not matter with any other rifle / load / shooter combo in the world; but it DID make a small difference in my test. What did I do about it? I keep the brass sorted by weight and simply verify my POI with the ammo I'm using before I go hunting. I shot this rifle 6 times this year, 3 times over a chrono to verify velocity and 3 times at 200yds to verify POI. The group at 200yds measured .362" (I don't think I had coffee that morning). HTH, AJ [/QUOTE]
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