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Rifles, Reloading, Optics, Equipment
Reloading
Ladder Test Confusion, 6.5 PRC
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<blockquote data-quote="Randy Tidwell" data-source="post: 2292807" data-attributes="member: 109136"><p>I'm confused?</p><p></p><p>Did a 10 shot ladder test for my Ruger No. 1 6.5 PRC.</p><p></p><p>Load Data: </p><p>6.5 PRC, 7.5 Twist, 27"</p><p>124 Hammer Hunter</p><p>Federal 210, ADG Brass turned to .014" thick (rifle has a .295 neck).</p><p>RE26 starting at 58 grs, increased .1 grs to 58.9</p><p></p><p>Brass has been prepped in detail, trimmed to .001" length.</p><p></p><p>I've done many ladder tests, bur this one has me confused.</p><p></p><p>Labradar results:</p><p>58.0 = <span style="color: rgb(226, 80, 65)">3343 FPS</span></p><p>58.1 = <span style="color: rgb(235, 107, 86)">3337 FPS</span></p><p>58.2 = 3301 FPS</p><p>58.3 = 3309 FPS</p><p>58.4 = 3300 FPS</p><p>58.5 = 3289 FPS</p><p>58.6 = 3304 FPS</p><p>58.7 = <span style="color: rgb(209, 72, 65)">3232 FPS</span></p><p>58.8 = 3397 FPS</p><p>58.9 = 3304 FPS</p><p></p><p>My confusion is why did I get 30+ fps faster with .2 less powder. Haven't see that before?</p><p>Load 7 was 70 fps slower, I'm attributing that to a bad read by the chrono.</p><p></p><p>Throwing out load 1, 2, & 8, I get ES of 19, SD of 6.2</p><p></p><p>58.3 grs seems to be the flat spot and I am happy with velocity, will start playing with seating depth with that load.</p><p></p><p>Graph attached.</p><p></p><p>What are your thoughts?</p><p></p><p>Randy</p></blockquote><p></p>
[QUOTE="Randy Tidwell, post: 2292807, member: 109136"] I'm confused? Did a 10 shot ladder test for my Ruger No. 1 6.5 PRC. Load Data: 6.5 PRC, 7.5 Twist, 27" 124 Hammer Hunter Federal 210, ADG Brass turned to .014" thick (rifle has a .295 neck). RE26 starting at 58 grs, increased .1 grs to 58.9 Brass has been prepped in detail, trimmed to .001" length. I've done many ladder tests, bur this one has me confused. Labradar results: 58.0 = [COLOR=rgb(226, 80, 65)]3343 FPS[/COLOR] 58.1 = [COLOR=rgb(235, 107, 86)]3337 FPS[/COLOR] 58.2 = 3301 FPS 58.3 = 3309 FPS 58.4 = 3300 FPS 58.5 = 3289 FPS 58.6 = 3304 FPS 58.7 = [COLOR=rgb(209, 72, 65)]3232 FPS[/COLOR] 58.8 = 3397 FPS 58.9 = 3304 FPS My confusion is why did I get 30+ fps faster with .2 less powder. Haven't see that before? Load 7 was 70 fps slower, I'm attributing that to a bad read by the chrono. Throwing out load 1, 2, & 8, I get ES of 19, SD of 6.2 58.3 grs seems to be the flat spot and I am happy with velocity, will start playing with seating depth with that load. Graph attached. What are your thoughts? Randy [/QUOTE]
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Reloading
Ladder Test Confusion, 6.5 PRC
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