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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet touching the lands or 2000th back?
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<blockquote data-quote="Lenny Foffa" data-source="post: 1670022" data-attributes="member: 100742"><p><strong>Hi, In my experience , every rifle will have a different and nearly perfect COAL and OGIVE length, with a particular Brand and weight of Bullet, and those measurements will change with different bullets . </strong>This is the fun of experimentation and load development testing. I shoot Bench Rest some times , and the common <strong>terms used are Jump and Jam. So somewhere between 15/1000 th Jump and 3/1000th Jam into the Lands and Grooves , is usually the ideal spot for the best accuracy, with that particular bullet, in that particular Rifle. </strong> In order to accomplish this you need to know where the lands and grooves are , so the Hornady ( or other brand ) OGIVE Measuring Gauge Kit will tell you the exact OGIVE length with any bullet you wish to try . In many case's this will be longer than the Factory COAL for that cartridge. In all my target rifles the COAL and OGIVE lengths that are best for accuracy , means the loaded rounds are too long for the Magazine Well ,or clip. So my target guns are shot in Single Shot mode. The Ogive Tool and a really good Micrometer Seating Die ( Forester , ect ) are a MUST, for making accurate loads. This is just my personal opinion, and I enjoy the search for the best possible accuracy loads. Hope this was helpful, Have fun with it!!! Lenny</p></blockquote><p></p>
[QUOTE="Lenny Foffa, post: 1670022, member: 100742"] [B]Hi, In my experience , every rifle will have a different and nearly perfect COAL and OGIVE length, with a particular Brand and weight of Bullet, and those measurements will change with different bullets . [/B]This is the fun of experimentation and load development testing. I shoot Bench Rest some times , and the common [B]terms used are Jump and Jam. So somewhere between 15/1000 th Jump and 3/1000th Jam into the Lands and Grooves , is usually the ideal spot for the best accuracy, with that particular bullet, in that particular Rifle. [/B] In order to accomplish this you need to know where the lands and grooves are , so the Hornady ( or other brand ) OGIVE Measuring Gauge Kit will tell you the exact OGIVE length with any bullet you wish to try . In many case's this will be longer than the Factory COAL for that cartridge. In all my target rifles the COAL and OGIVE lengths that are best for accuracy , means the loaded rounds are too long for the Magazine Well ,or clip. So my target guns are shot in Single Shot mode. The Ogive Tool and a really good Micrometer Seating Die ( Forester , ect ) are a MUST, for making accurate loads. This is just my personal opinion, and I enjoy the search for the best possible accuracy loads. Hope this was helpful, Have fun with it!!! Lenny [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet touching the lands or 2000th back?
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