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Rifles, Reloading, Optics, Equipment
Reloading
Dusty Rounds Moving Faster
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<blockquote data-quote="jrock" data-source="post: 1989990" data-attributes="member: 78569"><p>I've been tracking a phenomena in my reloading lately. I will load up a test the day or two before I shoot it. I pick a load I like, then load up 50. I pull them off the shelf 4+ weeks later and notice the velocities 100+ fps faster with ejector marks and hard bolt lifts. I have not seen this with anything I have previously worked on.</p><p></p><p>The chamber is a 6.5 GAP 4S neck turn, 28" 5R barrel, H1000 out of an 8 lb keg, and Norma brass. I've see this phenomena with two bullets I've tested. Therefore, it doesn't appear to have anything to do with the bullet. Since the powder is coming out of an 8 lb keg, I don't think it has anything to do with lot variance. It <em>is </em>my first time playing with imperial dry lube on the necks, both inside and out with a bushing die. </p><p></p><p>- I've heard humidity during reloading can be an issue. I have a home humidifier that keeps it within 5% so that doesn't seem likely.</p><p>- Since I'm using a bushing die, I wouldn't think the necks are relaxing to increase neck tension. I've heard that may occur over time with expander use. </p><p>- I've heard bonding of the bullet to the neck over time may be an issue but its just 4 weeks. I haven't had any issues with other guns and ammo I reload.</p><p>- I've tried tests with clean and fouled barrel conditions with no fix to the issue.</p><p></p><p>Maybe I need to avoid loading up tests right before I shoot them. </p><p>Any suggestions will be appreciated.</p></blockquote><p></p>
[QUOTE="jrock, post: 1989990, member: 78569"] I've been tracking a phenomena in my reloading lately. I will load up a test the day or two before I shoot it. I pick a load I like, then load up 50. I pull them off the shelf 4+ weeks later and notice the velocities 100+ fps faster with ejector marks and hard bolt lifts. I have not seen this with anything I have previously worked on. The chamber is a 6.5 GAP 4S neck turn, 28" 5R barrel, H1000 out of an 8 lb keg, and Norma brass. I've see this phenomena with two bullets I've tested. Therefore, it doesn't appear to have anything to do with the bullet. Since the powder is coming out of an 8 lb keg, I don't think it has anything to do with lot variance. It [I]is [/I]my first time playing with imperial dry lube on the necks, both inside and out with a bushing die. - I've heard humidity during reloading can be an issue. I have a home humidifier that keeps it within 5% so that doesn't seem likely. - Since I'm using a bushing die, I wouldn't think the necks are relaxing to increase neck tension. I've heard that may occur over time with expander use. - I've heard bonding of the bullet to the neck over time may be an issue but its just 4 weeks. I haven't had any issues with other guns and ammo I reload. - I've tried tests with clean and fouled barrel conditions with no fix to the issue. Maybe I need to avoid loading up tests right before I shoot them. Any suggestions will be appreciated. [/QUOTE]
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Dusty Rounds Moving Faster
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