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Rifles, Reloading, Optics, Equipment
Reloading
6.5 saum question
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<blockquote data-quote="Weaver93" data-source="post: 2531290" data-attributes="member: 120245"><p>Depending on projectile ogive design there can be more length in front of the bearing surface on one than other projectiles. I believe the 147 ELD-M in 6.5 has a pretty high BC so it probably fits that category. If you seated a Sierra and that ELD-M to the same BTO you would see your OAL difference due to the design of the projectiles.</p><p></p><p>Some projectiles are not very sensitive to jump and can run well with a stretch to the lands others, like some Berger projectiles are really sensitive. I say this and should say that jump sensitivity is relative since what does not matter to me would give a bench rest guy a heart attack! Most of those guys jam everything into the lands. .050" off is nowhere near a jam, but it doesn't mean they won't shoot good there. Use a comparator to measure and you will see what difference ogive design makes. Staying away from compressing you powder will help with pressures and keep your brass running longer too.</p><p></p><p>[URL unfurl="true"]https://bergerbullets.com/effects-of-cartridge-over-all-length-coal-and-cartridge-base-to-ogive-cbto-part-2/[/URL]</p></blockquote><p></p>
[QUOTE="Weaver93, post: 2531290, member: 120245"] Depending on projectile ogive design there can be more length in front of the bearing surface on one than other projectiles. I believe the 147 ELD-M in 6.5 has a pretty high BC so it probably fits that category. If you seated a Sierra and that ELD-M to the same BTO you would see your OAL difference due to the design of the projectiles. Some projectiles are not very sensitive to jump and can run well with a stretch to the lands others, like some Berger projectiles are really sensitive. I say this and should say that jump sensitivity is relative since what does not matter to me would give a bench rest guy a heart attack! Most of those guys jam everything into the lands. .050" off is nowhere near a jam, but it doesn't mean they won't shoot good there. Use a comparator to measure and you will see what difference ogive design makes. Staying away from compressing you powder will help with pressures and keep your brass running longer too. [URL unfurl="true"]https://bergerbullets.com/effects-of-cartridge-over-all-length-coal-and-cartridge-base-to-ogive-cbto-part-2/[/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
6.5 saum question
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