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Rifles, Reloading, Optics, Equipment
Reloading
300WM/Berger 210/H1000 Reloading Issue
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<blockquote data-quote="SES50" data-source="post: 160828" data-attributes="member: 7753"><p>I started putting a new load together for my 300WM a while back to reach out a little farther than my old load and I fired it for the first time this week. The results are a little confusing. Maybe some of you can help me out.</p><p></p><p>When putting the load together I looked in three different books and interpolated between the 200 and the 220 loads to get the powder charge for the 210. This is what the books read:</p><p>1) Lee Modern Reloading Second Edition</p><p></p><p>200 Grain Jacketed Bullet</p><p>H1000 - Min 74.0 - 2723 FPS</p><p> Max 79.0c - 2883 FPS</p><p></p><p>220 Grain Jacketed Bullet</p><p>H1000 - Min 73.0 - 2597 FPS</p><p> Max 78.0 - 2750 FPS</p><p></p><p>So I get for 210 Grain Bullet 73.5 - 78.5 Grains of powder from this book.</p><p></p><p>2) Barnes Reloading Manual Number 3</p><p></p><p>200 Grain Bullet</p><p>H1000 - Min 72.5 Grains - 2516 FPS</p><p> Max 77.5 Grains - 2689 FPS</p><p></p><p>3) Speer Reloading Manual Number 13</p><p></p><p>200 Grain Bullet</p><p>H1000 - Min 73.0 Grains - 2629 FPS</p><p> Max 77.0c Grains - 2797 FPS</p><p></p><p>So I loaded up 5 rounds of each load between 76.0 - 78.5 in half grain intervals to see what I got. My crono did not read every round fired but I got some readings for every shot fired. Also all the brass showed high pressure signs with the primer pushed out flat and one case actually having the head pop off after it was back in my reloading bullet carrier box.</p><p></p><p>Here are the speeds I recorded:</p><p>78.5 Grains</p><p>2930</p><p>2936</p><p>2936</p><p>2962</p><p>2962</p><p></p><p>78.0 Grains</p><p>2962</p><p>NR</p><p>NR</p><p>NR</p><p>2898</p><p></p><p>77.5 Grains</p><p>NR</p><p>2917</p><p>2861</p><p>2892</p><p>2892</p><p></p><p>77.0 Grains</p><p>2861</p><p>2879</p><p>2873</p><p>2867</p><p>2886</p><p></p><p>76.5 Grains</p><p>2930</p><p>2949</p><p>2982</p><p>2976</p><p>2996</p><p></p><p>76.0 Grains</p><p>NR</p><p>2949</p><p>NR</p><p>2917</p><p>2969</p><p></p><p>So the interesting thing is that the velocities start high then drop down as the powder goes down in volume and then the velocities increase again. I am shooting these out of a 26" barrel on a T/C Encore and the velocities seem really high with what I compare to the velocities the book says I should be getting. If I figure every inch of extra barrel adds about 50 FPS these bullets should not be going this fast.</p><p></p><p>These loads are not crimped and are .010" off the lands. I am using GM215M primers and I trickled every powder load so I believe the powder weight is dead on. Also the 78.5 Grain load had the best group at a little over .5 MOA. </p><p></p><p>So, can anyone explain to me why I am getting the cases falling apart and the primers really pushed out? And why do I have the strange velocity fluctuations? Anyone else using H1000 in a 300WM?</p><p></p><p>Thanks</p><p>SES</p></blockquote><p></p>
[QUOTE="SES50, post: 160828, member: 7753"] I started putting a new load together for my 300WM a while back to reach out a little farther than my old load and I fired it for the first time this week. The results are a little confusing. Maybe some of you can help me out. When putting the load together I looked in three different books and interpolated between the 200 and the 220 loads to get the powder charge for the 210. This is what the books read: 1) Lee Modern Reloading Second Edition 200 Grain Jacketed Bullet H1000 - Min 74.0 - 2723 FPS Max 79.0c - 2883 FPS 220 Grain Jacketed Bullet H1000 - Min 73.0 - 2597 FPS Max 78.0 - 2750 FPS So I get for 210 Grain Bullet 73.5 - 78.5 Grains of powder from this book. 2) Barnes Reloading Manual Number 3 200 Grain Bullet H1000 - Min 72.5 Grains - 2516 FPS Max 77.5 Grains - 2689 FPS 3) Speer Reloading Manual Number 13 200 Grain Bullet H1000 - Min 73.0 Grains - 2629 FPS Max 77.0c Grains - 2797 FPS So I loaded up 5 rounds of each load between 76.0 - 78.5 in half grain intervals to see what I got. My crono did not read every round fired but I got some readings for every shot fired. Also all the brass showed high pressure signs with the primer pushed out flat and one case actually having the head pop off after it was back in my reloading bullet carrier box. Here are the speeds I recorded: 78.5 Grains 2930 2936 2936 2962 2962 78.0 Grains 2962 NR NR NR 2898 77.5 Grains NR 2917 2861 2892 2892 77.0 Grains 2861 2879 2873 2867 2886 76.5 Grains 2930 2949 2982 2976 2996 76.0 Grains NR 2949 NR 2917 2969 So the interesting thing is that the velocities start high then drop down as the powder goes down in volume and then the velocities increase again. I am shooting these out of a 26" barrel on a T/C Encore and the velocities seem really high with what I compare to the velocities the book says I should be getting. If I figure every inch of extra barrel adds about 50 FPS these bullets should not be going this fast. These loads are not crimped and are .010" off the lands. I am using GM215M primers and I trickled every powder load so I believe the powder weight is dead on. Also the 78.5 Grain load had the best group at a little over .5 MOA. So, can anyone explain to me why I am getting the cases falling apart and the primers really pushed out? And why do I have the strange velocity fluctuations? Anyone else using H1000 in a 300WM? Thanks SES [/QUOTE]
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300WM/Berger 210/H1000 Reloading Issue
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