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Rifles, Reloading, Optics, Equipment
Reloading
How often do you bump the shoulder back?
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<blockquote data-quote="Lefty7mmstw" data-source="post: 1137448" data-attributes="member: 48043"><p>I fl size every time. I want the brass to enter the chamber at the same dimensions for every firing. I'll sacrifice a shot or two of brass life for this. </p><p> </p><p>Fl sized brass will often index in the chamber more squarely too (and hence be more accurate), since it won't bind on any out of round dimension that your rifle likely has. It will index on the case head and the headspace point, whether it is a belt of shoulder and that is it, every time... Not so with and out of round chamber and neck sized ammo... It will index at the above points and/or anywhere the case touches an out of center/ round point in the chamber. If the brass isn't turned to the exact rotation it was on the previous shot, it will not be square to the world.</p><p> </p><p>My last 7stw barrel was a case in point for this, as it shot into .5 to .6 moa with fl sized ammo... I tried to neck size or partial fl size the bras to save brass life ( the chamber was cut extremely long) and the accuracy fell to 1.5 moa. A more extreme difference than usual to be sure, but it can and often does happen.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 1137448, member: 48043"] I fl size every time. I want the brass to enter the chamber at the same dimensions for every firing. I'll sacrifice a shot or two of brass life for this. Fl sized brass will often index in the chamber more squarely too (and hence be more accurate), since it won't bind on any out of round dimension that your rifle likely has. It will index on the case head and the headspace point, whether it is a belt of shoulder and that is it, every time... Not so with and out of round chamber and neck sized ammo... It will index at the above points and/or anywhere the case touches an out of center/ round point in the chamber. If the brass isn't turned to the exact rotation it was on the previous shot, it will not be square to the world. My last 7stw barrel was a case in point for this, as it shot into .5 to .6 moa with fl sized ammo... I tried to neck size or partial fl size the bras to save brass life ( the chamber was cut extremely long) and the accuracy fell to 1.5 moa. A more extreme difference than usual to be sure, but it can and often does happen. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How often do you bump the shoulder back?
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