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Rifles, Reloading, Optics, Equipment
Reloading
300 Win Mag with 208 AMAX - Help
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<blockquote data-quote="SubMOAR" data-source="post: 1159816" data-attributes="member: 94212"><p>So I decided to load the 208 AMAX to max mag length which is 3.485", since this rifle and load will be used for hunting. A shorter COL reduces the max powder capacity so I filled cases to see which one got me closest to compressed with my FC military brass, and came up with 75.0 grains of H1000 is max with my 3.485" COL.</p><p></p><p>Did a test with the magnetospeed. 72.5, 73.0, 73.5, 74.0, 74.5, 75.0 of H1000.</p><p></p><p>My accuracy node became very apparent from 74.0 - 75.0, possibly even past 75.0 but I would be compressing powder at that point. I checked the velocities and 74.5 grains was 2,707 Avg. and 75.0 was 2,721 AVG. Both had a SD of 10, and Extreme spread was 22 for 75.0, and 28 for 74.5. With the velocities only having a difference of 14 FPS, I have more room for error with my powder charge, and lot inconsistencies.</p><p></p><p>So I am definitely liking the 74.5 and 75.0. My next test will include running 74.4, 74.6, 74.8, 75.0 and seeing where my accuracy and velocity plateau and I am fairly certain that I will have my load developed (4 shots into 1" or better consistently is acceptable to me with stable velocities).</p><p></p><p>4 Shots - 74.0 had a center to center group of .850", 74.5 was .700", and 75.0 grains was .865".</p><p></p><p>I used the 208 AMAX bullet as a reference for size.</p><p><img src="http://i265.photobucket.com/albums/ii240/PPPluschakov/8471e5f6-faf1-46dc-b8bb-b53db7ecaab4_zps914xh29n.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="SubMOAR, post: 1159816, member: 94212"] So I decided to load the 208 AMAX to max mag length which is 3.485", since this rifle and load will be used for hunting. A shorter COL reduces the max powder capacity so I filled cases to see which one got me closest to compressed with my FC military brass, and came up with 75.0 grains of H1000 is max with my 3.485" COL. Did a test with the magnetospeed. 72.5, 73.0, 73.5, 74.0, 74.5, 75.0 of H1000. My accuracy node became very apparent from 74.0 - 75.0, possibly even past 75.0 but I would be compressing powder at that point. I checked the velocities and 74.5 grains was 2,707 Avg. and 75.0 was 2,721 AVG. Both had a SD of 10, and Extreme spread was 22 for 75.0, and 28 for 74.5. With the velocities only having a difference of 14 FPS, I have more room for error with my powder charge, and lot inconsistencies. So I am definitely liking the 74.5 and 75.0. My next test will include running 74.4, 74.6, 74.8, 75.0 and seeing where my accuracy and velocity plateau and I am fairly certain that I will have my load developed (4 shots into 1" or better consistently is acceptable to me with stable velocities). 4 Shots - 74.0 had a center to center group of .850", 74.5 was .700", and 75.0 grains was .865". I used the 208 AMAX bullet as a reference for size. [IMG]http://i265.photobucket.com/albums/ii240/PPPluschakov/8471e5f6-faf1-46dc-b8bb-b53db7ecaab4_zps914xh29n.jpg[/IMG] [/QUOTE]
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300 Win Mag with 208 AMAX - Help
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