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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Help..Throat length / Freebore / bullet jump
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<blockquote data-quote="Longtine88" data-source="post: 2617479" data-attributes="member: 116240"><p>Well I do have several. And currently putting a XM length together with a saami chambered proof prefit.</p><p></p><p>With a saami chamber a 180 hybrid will have a CBTO of 2.284" touching lands and around 3.018" for a COAL. I have one rifle that has a freebore of 0.190 and the 180's touch at 2.354"CBTO and 3.088" COAL.</p><p></p><p>Honestly I have just started using saami chambered prefits because I have no issue getting the 180's to the 3,000' mark. The 175's to the 3,030' mark. So no need of longer freebore and I can load them longer time wise because of throat erosion. And I generally find the best length right just shy of the lands.</p><p></p><p>Greatest cartridge in my book. You picked a good one.</p></blockquote><p></p>
[QUOTE="Longtine88, post: 2617479, member: 116240"] Well I do have several. And currently putting a XM length together with a saami chambered proof prefit. With a saami chamber a 180 hybrid will have a CBTO of 2.284" touching lands and around 3.018" for a COAL. I have one rifle that has a freebore of 0.190 and the 180's touch at 2.354"CBTO and 3.088" COAL. Honestly I have just started using saami chambered prefits because I have no issue getting the 180's to the 3,000' mark. The 175's to the 3,030' mark. So no need of longer freebore and I can load them longer time wise because of throat erosion. And I generally find the best length right just shy of the lands. Greatest cartridge in my book. You picked a good one. [/QUOTE]
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Help..Throat length / Freebore / bullet jump
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