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Rifles, Reloading, Optics, Equipment
Reloading
220 swift test results. Opinions needed
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<blockquote data-quote="FearNoWind" data-source="post: 1029516" data-attributes="member: 50867"><p>Can't say as I've ever handled a 40 grain A-Max but I am familiar with their Z-Max and V-Max in that weight. Like some others here, I'd recommend you jump up to a 50 grain bullet and start over. Whether you choose a Hornady or Sierra etc. you'll probably have to settle for something below a .250 BC but the ballistic tips help keep the weight concentrated to the center of the bullet's length so stability should not be a major issue at the velocities that rifle is capable of.</p><p>I'd avoid any flat based bullets and rely on boat tails for better stability and greater preservation of velocity over distance.</p><p>If you're going to stay with the 40 grain bullet:</p><p><strong>1. What is the next step in continued testing loads? </strong></p><p>Seating depth</p><p><strong>2. What do the up and down sizes really mean?</strong></p><p>How barrel harmonics influence your shot groups</p><p><strong>Does it mean with barrel harmonics that my rifle shoots better with lighter powder charge and a heavier one. 36.8 and 38.8?</strong></p><p><strong></strong>Yes and No. It means that you have a rifle that is performing as expected;; it will reveal more than one "sweet spot" at various points within a range of test loads.</p><p><strong>3. Do I take the best two or three weights and shoot more or do I tinker with coal?</strong></p><p>I'd suggest you begin using CBOL and avoiding COAL. That's the best way I know of to maintain consistency in seating depth.</p></blockquote><p></p>
[QUOTE="FearNoWind, post: 1029516, member: 50867"] Can't say as I've ever handled a 40 grain A-Max but I am familiar with their Z-Max and V-Max in that weight. Like some others here, I'd recommend you jump up to a 50 grain bullet and start over. Whether you choose a Hornady or Sierra etc. you'll probably have to settle for something below a .250 BC but the ballistic tips help keep the weight concentrated to the center of the bullet's length so stability should not be a major issue at the velocities that rifle is capable of. I'd avoid any flat based bullets and rely on boat tails for better stability and greater preservation of velocity over distance. If you're going to stay with the 40 grain bullet: [B]1. What is the next step in continued testing loads? [/B] Seating depth [B]2. What do the up and down sizes really mean?[/B] How barrel harmonics influence your shot groups [B]Does it mean with barrel harmonics that my rifle shoots better with lighter powder charge and a heavier one. 36.8 and 38.8? [/B]Yes and No. It means that you have a rifle that is performing as expected;; it will reveal more than one "sweet spot" at various points within a range of test loads. [B]3. Do I take the best two or three weights and shoot more or do I tinker with coal?[/B] I'd suggest you begin using CBOL and avoiding COAL. That's the best way I know of to maintain consistency in seating depth. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
220 swift test results. Opinions needed
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