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Rifles, Reloading, Optics, Equipment
Reloading
Rl-22 sensative
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<blockquote data-quote="J E Custom" data-source="post: 351147" data-attributes="member: 2736"><p>I have read several articles on this phenomenon and had similar results with some powders</p><p>and then the next time out did not have what seamed to be a problem.</p><p></p><p>Hear is what I have seen, If you work up a load @ 70o and chronograph it if you test it at </p><p>100o the velocity will be higher with some powders but the point of impact may not move</p><p>very much (Especially at the shorter distances) at 300 or 400 yards.</p><p></p><p>If you shoot the same load @ 30o you may lose a little velocity but the POI won't change</p><p>much because the humidity is normally much less.</p><p></p><p>Also if you keep your rifle and ammo at the same temperature the spread is not as bad .But</p><p>if you leave your rifle out in the cold weather and not the ammo it will change the POI more </p><p>than if it is kept warmer than the outside temperature and the ammo is also kept in your pocket</p><p>untill needed.</p><p></p><p>I read somewhere that a cold rifle fireing pin may travel slower causing poor ignition and</p><p>slower velocities, Not sure about that , but I have seen actions freeze up because of to much grease and oil in the action.</p><p></p><p>The best thing to do is test the load at both high and low temperatures and note the difference </p><p>on your loading log.</p><p></p><p>I find that the Extreme powders from hodgdon do seem to help but there are other powders</p><p>that are not as temp sensitive as others so the only to find if it makes a difference is to</p><p>test you load under all conditions.</p><p></p><p>A chronograph is the only way to find if it effects velocity and shooting is the only to find out</p><p>if it changes your POI.</p><p></p><p>Not really a solid answer but the rule is "There is no rule".</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 351147, member: 2736"] I have read several articles on this phenomenon and had similar results with some powders and then the next time out did not have what seamed to be a problem. Hear is what I have seen, If you work up a load @ 70o and chronograph it if you test it at 100o the velocity will be higher with some powders but the point of impact may not move very much (Especially at the shorter distances) at 300 or 400 yards. If you shoot the same load @ 30o you may lose a little velocity but the POI won't change much because the humidity is normally much less. Also if you keep your rifle and ammo at the same temperature the spread is not as bad .But if you leave your rifle out in the cold weather and not the ammo it will change the POI more than if it is kept warmer than the outside temperature and the ammo is also kept in your pocket untill needed. I read somewhere that a cold rifle fireing pin may travel slower causing poor ignition and slower velocities, Not sure about that , but I have seen actions freeze up because of to much grease and oil in the action. The best thing to do is test the load at both high and low temperatures and note the difference on your loading log. I find that the Extreme powders from hodgdon do seem to help but there are other powders that are not as temp sensitive as others so the only to find if it makes a difference is to test you load under all conditions. A chronograph is the only way to find if it effects velocity and shooting is the only to find out if it changes your POI. Not really a solid answer but the rule is "There is no rule". J E CUSTOM [/QUOTE]
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Reloading
Rl-22 sensative
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