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Rifles, Reloading, Optics, Equipment
Reloading
Advise on my .300 win mag load
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<blockquote data-quote="arrow" data-source="post: 806688" data-attributes="member: 9798"><p>I am using norma brass, h1000 powder, federal 215m primers, and berger 230 hybrid target bullets. I fireformed brass, uniformed primer pockets, deburred flash holes, trimmed and chamfered to uniform length. I tested 72-75 grain loads .040" jump in half grain increments. 75 grains just barely showed ejector marks and 74.5 and 75 showed huge extreme spread like 80-100 fps making me believe 74.5 is getting a little hot. I posted a thread a couple days about my primers not seating flush. (Even called brownells and still no answer) So this could be a cause of higher than normal extreme spread. So today I tested 73.4, 73.7, and 74.0 grains and .040" and .090" jump. Here are the results:</p><p></p><p>Seating Depth: Powder Charge: CTC: Velocity: 1: 2: 3: </p><p></p><p>.040" 73.4 .256" 2567 2466 2478</p><p>.040" 73.7 .118" 2721 2732 2744</p><p>.040" 74.0 1.192" 2840 2822 2838</p><p>.090" 73.4 1.002 " 2589 2629 2642</p><p>.090" 73.7 1.026" 2785 2800 2739</p><p>.090" 74.0 .587" 2836 2826 2842</p><p></p><p>These were all shot from 100 yards 3 shot groups in the order listed. Once I got to .040" 74.0 grains the mirage was real bad and I was chasing that little dot around probably explaining how they opened up so much after that. Some of these ES are horrible and even the best ones are barely acceptable. Yes I know 3 shots isnt really a good representation of ES of a load. Like I was saying earlier, my primers are not sitting all the way flush for some reason. Could this explain it? Or is my chrono giving false readings. I find it funny how from 73.4 grains to 73.7 grains there is a 229 fps increase. </p><p></p><p>So 4/6 of my loads where shot in horrible mirage bringing sub 1/4 moa groups to over 1" and my chrono is more than likely no working right. where do I go from here? Is it safe to say .040" and 73.7 grains is a load worth loading some up of and trying out farther? Or do I need to redo this test for accuracy and forget about the chrono?</p><p></p><p>700 action</p><p>brouton 9 twist #8 contour 28" </p><p>badger thruster break</p><p>mcmillan a5</p><p>ptg tactical bottom metal</p><p>badger rings/ base</p><p>nightforce 5.5-22x50</p><p></p><p>Shooting off sandbags. Let me know if there is any other information needed to solve this puzzle.</p><p></p><p>Thanks</p><p>Zack</p></blockquote><p></p>
[QUOTE="arrow, post: 806688, member: 9798"] I am using norma brass, h1000 powder, federal 215m primers, and berger 230 hybrid target bullets. I fireformed brass, uniformed primer pockets, deburred flash holes, trimmed and chamfered to uniform length. I tested 72-75 grain loads .040" jump in half grain increments. 75 grains just barely showed ejector marks and 74.5 and 75 showed huge extreme spread like 80-100 fps making me believe 74.5 is getting a little hot. I posted a thread a couple days about my primers not seating flush. (Even called brownells and still no answer) So this could be a cause of higher than normal extreme spread. So today I tested 73.4, 73.7, and 74.0 grains and .040" and .090" jump. Here are the results: Seating Depth: Powder Charge: CTC: Velocity: 1: 2: 3: .040" 73.4 .256" 2567 2466 2478 .040" 73.7 .118" 2721 2732 2744 .040" 74.0 1.192" 2840 2822 2838 .090" 73.4 1.002 " 2589 2629 2642 .090" 73.7 1.026" 2785 2800 2739 .090" 74.0 .587" 2836 2826 2842 These were all shot from 100 yards 3 shot groups in the order listed. Once I got to .040" 74.0 grains the mirage was real bad and I was chasing that little dot around probably explaining how they opened up so much after that. Some of these ES are horrible and even the best ones are barely acceptable. Yes I know 3 shots isnt really a good representation of ES of a load. Like I was saying earlier, my primers are not sitting all the way flush for some reason. Could this explain it? Or is my chrono giving false readings. I find it funny how from 73.4 grains to 73.7 grains there is a 229 fps increase. So 4/6 of my loads where shot in horrible mirage bringing sub 1/4 moa groups to over 1" and my chrono is more than likely no working right. where do I go from here? Is it safe to say .040" and 73.7 grains is a load worth loading some up of and trying out farther? Or do I need to redo this test for accuracy and forget about the chrono? 700 action brouton 9 twist #8 contour 28" badger thruster break mcmillan a5 ptg tactical bottom metal badger rings/ base nightforce 5.5-22x50 Shooting off sandbags. Let me know if there is any other information needed to solve this puzzle. Thanks Zack [/QUOTE]
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Advise on my .300 win mag load
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