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Rifles, Reloading, Optics, Equipment
Reloading
How many rounds to develop a load?
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<blockquote data-quote="J E Custom" data-source="post: 273450" data-attributes="member: 2736"><p>I use a chronograph for the process of eleminating bad loads and don't worry about group </p><p>size in the begining.</p><p></p><p>It goes something like this=</p><p></p><p>First I select the bullet I would prefer to use.</p><p></p><p>Then I look at loading data for powder that has maximum performance and velocityat 100% </p><p>case density.</p><p></p><p>Next I load 3 rounds ,each with different powder charges starting midrange and moving </p><p>up to Max listed load by .5 gr increments.</p><p></p><p>Repeat the process with the next best powder listed.</p><p></p><p>Now its off to the range to test the loads. Make a log and keep very good records on all the</p><p>test loads (Even the bad ones) they will come in handy later on.</p><p></p><p>Start with the lowest loads and work up using the crony.</p><p></p><p>I eleminate based on bad SDs sometimes with only 2 shots and save the other rounds for </p><p>fowling shots or pull the bullets and reload to save the brass from to many firings.</p><p></p><p>Once you find good Standard deviations then zero in on powder charge,seating depth,primer,</p><p>even bullet type (Same weight).</p><p></p><p>With out good SDs you will never have good groups at long distances because this is the load</p><p>burn consistancy and with velocity changes vertical and horizontal stringing will drive you crazy</p><p>even if everthing else is good .( Like bedding ,barrel twist ,trigger pull ,ETC.</p><p></p><p>This process has saved me many rounds of testing and lots of brass over the way I use to do</p><p>my load development.</p><p></p><p>So now I some times luck out and find a realy good load after only25 or 30 rounds down the </p><p>tube but sometimes tweeking to get the very best load can add another 20 or so rounds to </p><p>the process.</p><p></p><p>Be patient and it will come.</p><p></p><p>Just the way I do load testing</p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 273450, member: 2736"] I use a chronograph for the process of eleminating bad loads and don't worry about group size in the begining. It goes something like this= First I select the bullet I would prefer to use. Then I look at loading data for powder that has maximum performance and velocityat 100% case density. Next I load 3 rounds ,each with different powder charges starting midrange and moving up to Max listed load by .5 gr increments. Repeat the process with the next best powder listed. Now its off to the range to test the loads. Make a log and keep very good records on all the test loads (Even the bad ones) they will come in handy later on. Start with the lowest loads and work up using the crony. I eleminate based on bad SDs sometimes with only 2 shots and save the other rounds for fowling shots or pull the bullets and reload to save the brass from to many firings. Once you find good Standard deviations then zero in on powder charge,seating depth,primer, even bullet type (Same weight). With out good SDs you will never have good groups at long distances because this is the load burn consistancy and with velocity changes vertical and horizontal stringing will drive you crazy even if everthing else is good .( Like bedding ,barrel twist ,trigger pull ,ETC. This process has saved me many rounds of testing and lots of brass over the way I use to do my load development. So now I some times luck out and find a realy good load after only25 or 30 rounds down the tube but sometimes tweeking to get the very best load can add another 20 or so rounds to the process. Be patient and it will come. Just the way I do load testing J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How many rounds to develop a load?
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