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Rifles, Reloading, Optics, Equipment
Reloading
POI shift with powder lot change
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<blockquote data-quote="Kroberts" data-source="post: 1095076" data-attributes="member: 71507"><p>How much of a POI shift is there normally when you change lot of powder? The other day a buddy and I were shooting at 1/2 gal jugs at 1000 yards and I was grouping right around the jugs. Which is about the normal grouping size that rifle does any more with its round count. At one point the poi shifted 2moa down and 4moa right and stayed. It took a few minutes to realize that was the point in my ammo box I had to open a new pound of powder. Wierd part was that I checked the 100 yard zero and the center of the group was to the right maybe 1/2" grouping in the 3/4" range, hard to tell on the steel since it left little craters that overlapped. I can understand the shift in the vertical but I don't understand the shift to the right at 1000 when the 100 yard wasn't near that much. Group size stayed the same just shifted. And the wind never changed. It went from ~0 windage to ~4moa. While my friend stayed with a 0 hold the entire time. The powder is H4350 in a 243win with the 95gr SMk. So is that a normal shift when switching to a different lot of powder?</p><p></p><p>Thanks</p><p>Kyle</p></blockquote><p></p>
[QUOTE="Kroberts, post: 1095076, member: 71507"] How much of a POI shift is there normally when you change lot of powder? The other day a buddy and I were shooting at 1/2 gal jugs at 1000 yards and I was grouping right around the jugs. Which is about the normal grouping size that rifle does any more with its round count. At one point the poi shifted 2moa down and 4moa right and stayed. It took a few minutes to realize that was the point in my ammo box I had to open a new pound of powder. Wierd part was that I checked the 100 yard zero and the center of the group was to the right maybe 1/2" grouping in the 3/4" range, hard to tell on the steel since it left little craters that overlapped. I can understand the shift in the vertical but I don't understand the shift to the right at 1000 when the 100 yard wasn't near that much. Group size stayed the same just shifted. And the wind never changed. It went from ~0 windage to ~4moa. While my friend stayed with a 0 hold the entire time. The powder is H4350 in a 243win with the 95gr SMk. So is that a normal shift when switching to a different lot of powder? Thanks Kyle [/QUOTE]
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Reloading
POI shift with powder lot change
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