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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5saum vs 6.5 saum 4s
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<blockquote data-quote="DJ Fergus" data-source="post: 1994066" data-attributes="member: 93895"><p>To my understanding there has been more than one variant of the 6.5 GAP but the latest has .081 free bore( 4s variant). The case is the same. Between the two. Most of what is designated as simply just 6.5 saum has a longer throat so bullets can be seated out longer in the case. That is the difference. You can shoot the prime ammo in a 6.5 gap 4s or 6.5 saum with a longer throat because the bullets are seated deep enough in the case for the shorter throat. It will be a longer bullet jump for a 6.5 saum with say a .120 or longer freebored throat. Brass and ammo manufactured for the 6.5 GAP 4s is now standardized but early on people formed it from 7mm saum brass and the neck diameter needed to be turned down, so when looking at chamber reamers there are some with a .298 diameter neck(no neck turn) and some with a .296 diameter neck (neck turned). Mine has the .298 neck. I recommend the .298 neck.</p></blockquote><p></p>
[QUOTE="DJ Fergus, post: 1994066, member: 93895"] To my understanding there has been more than one variant of the 6.5 GAP but the latest has .081 free bore( 4s variant). The case is the same. Between the two. Most of what is designated as simply just 6.5 saum has a longer throat so bullets can be seated out longer in the case. That is the difference. You can shoot the prime ammo in a 6.5 gap 4s or 6.5 saum with a longer throat because the bullets are seated deep enough in the case for the shorter throat. It will be a longer bullet jump for a 6.5 saum with say a .120 or longer freebored throat. Brass and ammo manufactured for the 6.5 GAP 4s is now standardized but early on people formed it from 7mm saum brass and the neck diameter needed to be turned down, so when looking at chamber reamers there are some with a .298 diameter neck(no neck turn) and some with a .296 diameter neck (neck turned). Mine has the .298 neck. I recommend the .298 neck. [/QUOTE]
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6.5saum vs 6.5 saum 4s
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