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<blockquote data-quote="PrairieGhost" data-source="post: 471211" data-attributes="member: 704"><p>Ok give me some thoughts.</p><p>First I think cool temperatures make powder burn at a lower rate. Barrels 22 inches long don't get advertised velocities, and they drop 100 to 200 fps from your handloads. I think when cold slows you powder a longer barrel will burn all of it. At 68° my 6.5x284 with a 140 VLD gives me 3036 fps. Today at 37° this morning I got 3036 average fps. In warm weather my 6.5 PRC and 6.5x284 are twins, but if it's cool the 26 inch barrel walks all over the 24 inch PRC.</p><p></p><p>I can't believe I got the same velocity with the temperature change. [ATTACH=full]80284[/ATTACH][ATTACH=full]80285[/ATTACH]</p><p></p><p></p><p>[ATTACH=full]80282[/ATTACH]</p></blockquote><p></p>
[QUOTE="PrairieGhost, post: 471211, member: 704"] Ok give me some thoughts. First I think cool temperatures make powder burn at a lower rate. Barrels 22 inches long don't get advertised velocities, and they drop 100 to 200 fps from your handloads. I think when cold slows you powder a longer barrel will burn all of it. At 68° my 6.5x284 with a 140 VLD gives me 3036 fps. Today at 37° this morning I got 3036 average fps. In warm weather my 6.5 PRC and 6.5x284 are twins, but if it's cool the 26 inch barrel walks all over the 24 inch PRC. I can't believe I got the same velocity with the temperature change. [ATTACH type="full"]80284[/ATTACH][ATTACH type="full"]80285[/ATTACH] [ATTACH type="full" alt="1000038721.jpg"]80282[/ATTACH] [/QUOTE]
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