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Rifles, Reloading, Optics, Equipment
Reloading
Hammer Bullets - Neck Tension and Crimping
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<blockquote data-quote="GLTaylor" data-source="post: 2943228" data-attributes="member: 111593"><p>When crimping, you start with a crimp and use the same crimp as you go up in your charge looking for pressure.</p><p>When you find pressure, it is prudent to drop back one full grain (or slightly more) and shoot groups.</p><p>If you start with a light crimp (I start with "0" to 1/8th crimp using B'Bean's method) - you typically do not see much change in pressure or velocity as you increase crimp (with Hammers). What you will see is a decided preference in a certain amount of crimp with the same powder charge. Many use crimp amount as the final tuning method (I do). Much like changing bullet seating depth in the old lead bullet days.</p><p>As you change crimp amount, you will likely see swings in ES and SD.</p></blockquote><p></p>
[QUOTE="GLTaylor, post: 2943228, member: 111593"] When crimping, you start with a crimp and use the same crimp as you go up in your charge looking for pressure. When you find pressure, it is prudent to drop back one full grain (or slightly more) and shoot groups. If you start with a light crimp (I start with "0" to 1/8th crimp using B'Bean's method) - you typically do not see much change in pressure or velocity as you increase crimp (with Hammers). What you will see is a decided preference in a certain amount of crimp with the same powder charge. Many use crimp amount as the final tuning method (I do). Much like changing bullet seating depth in the old lead bullet days. As you change crimp amount, you will likely see swings in ES and SD. [/QUOTE]
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Reloading
Hammer Bullets - Neck Tension and Crimping
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