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Rifles, Reloading, Optics, Equipment
Reloading
Starting Load for new Sendero
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<blockquote data-quote="johnnyk" data-source="post: 289643" data-attributes="member: 307"><p>at which COL?</p><p></p><p></p><p>The COL for my rifle with 165 & 180gn NBT's is 2.9105" (right now). For the 180gn SMK it's 2.8950". These (COL's) will lengthen over time as the throat erodes. Lovingly refered to as "chasing the lands". I start seating most of my bullets at .010" off the LaG's. This seems to work good for me when using Nosler, Sierra and some of the older Hornady bullets, I can only guess it's because of the tangent ogive of these bullets.</p><p>The newer Hornady bullets and the Berger VLD's have a secant ogive and seem to require different seating depth(s). Some "jammed" in the LaG's, some touching and some "jumping" as much as .120". Barnes recommends starting their slugs at .050" due to the softer (or is it harder?)nature of them.</p><p>I use an older Stoney Point OAL gauge (bought by Hornady) with accesories for my digital caliber to determine a specific OAL for the various bullets that I reload.</p><p>Do a google search for "tangent ogive" and you'll find a wealth of knowledge on the subject. There are articles from Dan Lilja and Walt Berger and makes for some good reading. JohnnyK.</p></blockquote><p></p>
[QUOTE="johnnyk, post: 289643, member: 307"] at which COL? The COL for my rifle with 165 & 180gn NBT's is 2.9105" (right now). For the 180gn SMK it's 2.8950". These (COL's) will lengthen over time as the throat erodes. Lovingly refered to as "chasing the lands". I start seating most of my bullets at .010" off the LaG's. This seems to work good for me when using Nosler, Sierra and some of the older Hornady bullets, I can only guess it's because of the tangent ogive of these bullets. The newer Hornady bullets and the Berger VLD's have a secant ogive and seem to require different seating depth(s). Some "jammed" in the LaG's, some touching and some "jumping" as much as .120". Barnes recommends starting their slugs at .050" due to the softer (or is it harder?)nature of them. I use an older Stoney Point OAL gauge (bought by Hornady) with accesories for my digital caliber to determine a specific OAL for the various bullets that I reload. Do a google search for "tangent ogive" and you'll find a wealth of knowledge on the subject. There are articles from Dan Lilja and Walt Berger and makes for some good reading. JohnnyK. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Starting Load for new Sendero
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