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Rifles, Reloading, Optics, Equipment
Reloading
Run-out help needed
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<blockquote data-quote="ajhardle" data-source="post: 739740" data-attributes="member: 49861"><p>Careful putting case lube in the mouth, some say a gob of it would affect burn rate. I never felt a need to do it, but you should use a dry lube.</p><p>I am surprised to here that your seeing that much run out on an unsized case, considering it should match the chamber pretty closely.</p><p>You're sizing the case neck diameter .010, according to your measurements, which is normal for a factory chamber, but the important measurement is constriction. Tell me how much that neck diameter grows when you insert a bullet. Most of my concentricity problems were from to much tension when forcing a bullet in there.</p><p>I like to see no more than .002" constriction. For example after a sized case measures .330, it should measure .032 with a bullet in there.</p></blockquote><p></p>
[QUOTE="ajhardle, post: 739740, member: 49861"] Careful putting case lube in the mouth, some say a gob of it would affect burn rate. I never felt a need to do it, but you should use a dry lube. I am surprised to here that your seeing that much run out on an unsized case, considering it should match the chamber pretty closely. You're sizing the case neck diameter .010, according to your measurements, which is normal for a factory chamber, but the important measurement is constriction. Tell me how much that neck diameter grows when you insert a bullet. Most of my concentricity problems were from to much tension when forcing a bullet in there. I like to see no more than .002" constriction. For example after a sized case measures .330, it should measure .032 with a bullet in there. [/QUOTE]
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