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Rifles, Reloading, Optics, Equipment
Reloading
270wsm and Barnes TTSX powder question
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<blockquote data-quote="wnc-coyote" data-source="post: 1052095" data-attributes="member: 31110"><p>One thing I should point out before you start right at the rifling is that all the tsx's I'm working with are old versions from before Barnes changed from a secant ogive to a tangent ogive. I was lucky enough to know they were changing and stocked up. I do not know what effect that will have on accuracy seating on the lands. I started by picking a medium powder charge loading 3-4 each at .05,.03,.015,.005. There should be one stand out with much tighter group. When you see which one that is load one more set of the same and make sure it is not just a fluke. Then I done a ladder test at 300 yards to find a range in powder with consistent group. I found that on my rifle to be between 74.5 - 75.5 gr. so then I loaded three sets. 74.5,75,75.5. I would normally have went with smaller increments but in ladder testing it shot a 1" group within this range. I settled on 75. Because at 75.5 I got some primer cratering. all three charges shot under 1/4".</p></blockquote><p></p>
[QUOTE="wnc-coyote, post: 1052095, member: 31110"] One thing I should point out before you start right at the rifling is that all the tsx's I'm working with are old versions from before Barnes changed from a secant ogive to a tangent ogive. I was lucky enough to know they were changing and stocked up. I do not know what effect that will have on accuracy seating on the lands. I started by picking a medium powder charge loading 3-4 each at .05,.03,.015,.005. There should be one stand out with much tighter group. When you see which one that is load one more set of the same and make sure it is not just a fluke. Then I done a ladder test at 300 yards to find a range in powder with consistent group. I found that on my rifle to be between 74.5 - 75.5 gr. so then I loaded three sets. 74.5,75,75.5. I would normally have went with smaller increments but in ladder testing it shot a 1" group within this range. I settled on 75. Because at 75.5 I got some primer cratering. all three charges shot under 1/4". [/QUOTE]
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Reloading
270wsm and Barnes TTSX powder question
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