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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
"Match" Chamber?
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<blockquote data-quote="elkaholic" data-source="post: 1610888" data-attributes="member: 13833"><p>A lot of the old theories don't really hold true anymore since long range became popular. For example, .002"-.003" clearance in the neck will more often than not raise es as opposed to .004"-005". At 100 yards, little if any difference in group size but very significant at 1000. Also, too tight a throat can cause pressures to be erratic and definitely costs velocity. There are other examples too but tight tolerances, when they work, means everything has to be near perfectly machined including the brass or it can cause more accuracy loss than gain.</p></blockquote><p></p>
[QUOTE="elkaholic, post: 1610888, member: 13833"] A lot of the old theories don't really hold true anymore since long range became popular. For example, .002"-.003" clearance in the neck will more often than not raise es as opposed to .004"-005". At 100 yards, little if any difference in group size but very significant at 1000. Also, too tight a throat can cause pressures to be erratic and definitely costs velocity. There are other examples too but tight tolerances, when they work, means everything has to be near perfectly machined including the brass or it can cause more accuracy loss than gain. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
"Match" Chamber?
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