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Rifles, Reloading, Optics, Equipment
Reloading
338-8mm rem mag
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<blockquote data-quote="comen" data-source="post: 2304800" data-attributes="member: 52622"><p>Ran the groups from 86.0 to 87.5</p><p>1. 86.0... Av 2808, extreme spread 37 fps</p><p>2. 86.5... av 2790, extreme spread 7.7 fps (weird, Chrony malfunction??)</p><p>3. 87.0... av 2876 extreme spread 39 fps</p><p>4. 87.5... ab 2883 extreme spread 38 fps</p><p></p><p>I still have no pressure signs. I am now reshooting 87.5, and adding 88.0 and 88.5 grains all three loads with 5 shot groups. I can still hear a little powder shake in the case at 88.5 but I'm very near 100% load density.</p><p>I am limited to 3.6" COAL by the magazine, so I decided to find where my bullet contacts the lands as a single feed. I seated the speer grand slam out until I could just feel the slightest contact and found my length was 3. 859" I have a boatload of freebore which explains the relatively low velocities for the powder charge. I may have to find a bullet that is very tolerant of long jumps. Any recommendations?</p></blockquote><p></p>
[QUOTE="comen, post: 2304800, member: 52622"] Ran the groups from 86.0 to 87.5 1. 86.0... Av 2808, extreme spread 37 fps 2. 86.5... av 2790, extreme spread 7.7 fps (weird, Chrony malfunction??) 3. 87.0... av 2876 extreme spread 39 fps 4. 87.5... ab 2883 extreme spread 38 fps I still have no pressure signs. I am now reshooting 87.5, and adding 88.0 and 88.5 grains all three loads with 5 shot groups. I can still hear a little powder shake in the case at 88.5 but I'm very near 100% load density. I am limited to 3.6" COAL by the magazine, so I decided to find where my bullet contacts the lands as a single feed. I seated the speer grand slam out until I could just feel the slightest contact and found my length was 3. 859" I have a boatload of freebore which explains the relatively low velocities for the powder charge. I may have to find a bullet that is very tolerant of long jumps. Any recommendations? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
338-8mm rem mag
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