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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why not use expander balls?
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<blockquote data-quote="AZShooter" data-source="post: 896878" data-attributes="member: 5219"><p>FL Dies that use a sizer ball also have a neck diameter that is significantly reduced to accommodate any brand of brass. As JE Custom already stated, this combination of die and the sizer ball brass can cause the necks to become work hardened which increases the neck tension. Only way to reduce the neck tension is to use a larger diameter sizer ball, which may not be as easy as it sounds. </p><p></p><p> The workhardened necks can cause excessive runout of loaded ammo . </p><p></p><p>I recently helped a friend put together some loads for his 300 Weatherby with three times fired brass. We used his RCBS FL die with a sizer ball. The necks were so work hardened that there was quite a bit of resistance when seating the bullets. I checked the sized brass before seating a bullet and the runout was very good at less than .003" The seated bullets had a runout of .009-.011" !!! We bought some new brass and the softer necks sized easily and the end result was runout of loaded ammo of less than .003"</p></blockquote><p></p>
[QUOTE="AZShooter, post: 896878, member: 5219"] FL Dies that use a sizer ball also have a neck diameter that is significantly reduced to accommodate any brand of brass. As JE Custom already stated, this combination of die and the sizer ball brass can cause the necks to become work hardened which increases the neck tension. Only way to reduce the neck tension is to use a larger diameter sizer ball, which may not be as easy as it sounds. The workhardened necks can cause excessive runout of loaded ammo . I recently helped a friend put together some loads for his 300 Weatherby with three times fired brass. We used his RCBS FL die with a sizer ball. The necks were so work hardened that there was quite a bit of resistance when seating the bullets. I checked the sized brass before seating a bullet and the runout was very good at less than .003" The seated bullets had a runout of .009-.011" !!! We bought some new brass and the softer necks sized easily and the end result was runout of loaded ammo of less than .003" [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why not use expander balls?
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