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Hunting
The Basics, Starting Out
Reloading Issue: Why do measurements vary?
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<blockquote data-quote="Lenny Foffa" data-source="post: 2615381" data-attributes="member: 100742"><p><span style="font-size: 22px">Excellent Question Judge, I have the same issue all the time. My cases are the same length, within a few Thousands. My cases are the same weight within 1/2 Grn or less of each other. My Bullets are within 1/10th of a grain of each other, and from one finished case to the next, there is always a few thousands difference. I use a Summit in line press for seating only, with Forester Micrometer seating dies, and there still always some difference. The Biggest difference for me, is the COAL, which can vary as much as 7/1000Th TO 10/1000 th. The OGIVE measurement can be 3/1000 to 4/1000 difference form case to case. What I have noticed is that the tips of the Nosler Ballistic tip bullets are almost never perfect. and therefore, the COAL will be off by that amount. A slightly crushed tip will result in a shorter COAL. My Hornady tool for measuring the OGIVE has Aluminum Bushings , not steel, so I can see a difference in the OGIVE Length from base of Bullet to Ogive. My Bench rest friends all use custom made bullets and Measure each bullet from base of Bullet to OGIVE of Bullet. Its done with Gauges that come from sources , other than Sinclair, I am not even aware of. I have come to think I am simply working within the limits of my Modest Middle of the Road Reloading Equpment, using Off the shelf Bullets. My bench rest friends have Equpment and Tools that exhibit a much higher level of quality and precision, than I do. As Hunting rifles are concerned, 3/1000 or 4/1000 difference in OGIVE does not mean I will not shoot very good groups at 100 to 300 yards. I continue to shoot excellent groups, with my Weatherby Hunting rifles, which allows me to hunt with confidence. As Bench Rest matches are concerned, I am simply not in their category. I have no .1000 5 shot groups to display and. brag about. I do have several .2500 which is respectable, but not competitive. I just cannot make ammo as perfect as they do. I think when that becomes important to me, I will need to invest in High end, or even Custom Equpment to get even more uniform and precise Reloads and reduce the differences from Finished Load to Finished Load. </span></p></blockquote><p></p>
[QUOTE="Lenny Foffa, post: 2615381, member: 100742"] [SIZE=6]Excellent Question Judge, I have the same issue all the time. My cases are the same length, within a few Thousands. My cases are the same weight within 1/2 Grn or less of each other. My Bullets are within 1/10th of a grain of each other, and from one finished case to the next, there is always a few thousands difference. I use a Summit in line press for seating only, with Forester Micrometer seating dies, and there still always some difference. The Biggest difference for me, is the COAL, which can vary as much as 7/1000Th TO 10/1000 th. The OGIVE measurement can be 3/1000 to 4/1000 difference form case to case. What I have noticed is that the tips of the Nosler Ballistic tip bullets are almost never perfect. and therefore, the COAL will be off by that amount. A slightly crushed tip will result in a shorter COAL. My Hornady tool for measuring the OGIVE has Aluminum Bushings , not steel, so I can see a difference in the OGIVE Length from base of Bullet to Ogive. My Bench rest friends all use custom made bullets and Measure each bullet from base of Bullet to OGIVE of Bullet. Its done with Gauges that come from sources , other than Sinclair, I am not even aware of. I have come to think I am simply working within the limits of my Modest Middle of the Road Reloading Equpment, using Off the shelf Bullets. My bench rest friends have Equpment and Tools that exhibit a much higher level of quality and precision, than I do. As Hunting rifles are concerned, 3/1000 or 4/1000 difference in OGIVE does not mean I will not shoot very good groups at 100 to 300 yards. I continue to shoot excellent groups, with my Weatherby Hunting rifles, which allows me to hunt with confidence. As Bench Rest matches are concerned, I am simply not in their category. I have no .1000 5 shot groups to display and. brag about. I do have several .2500 which is respectable, but not competitive. I just cannot make ammo as perfect as they do. I think when that becomes important to me, I will need to invest in High end, or even Custom Equpment to get even more uniform and precise Reloads and reduce the differences from Finished Load to Finished Load. [/SIZE] [/QUOTE]
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The Basics, Starting Out
Reloading Issue: Why do measurements vary?
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