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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy problem at distance?
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<blockquote data-quote="RT2506" data-source="post: 1490993" data-attributes="member: 10178"><p>Which direction is the spread of shots at 400? If vertical it is the load having a wide standard deviation between velocities of shots causing the shots to string vertical. Horizonal spread can be wind effect on bullet. At 400 yards it does not take much wind to move that little bullet a long ways. If your spread is all over the place it could be your shooting form mixed in with some of the other things. If you are not using a chrno to tell you what the load is doing it will be VERY HARD to cure your problem. You must know your standard deviation and extreme spread of velocities. With a max listed load of the powders you are using out of a 17" barrel and I assume this is a 223 Rem. your muzzle velocity should be around 2800 fps so at 400 yards it has slowed down a bunch and wind, even a little bit, can greatly effect point of impact.</p></blockquote><p></p>
[QUOTE="RT2506, post: 1490993, member: 10178"] Which direction is the spread of shots at 400? If vertical it is the load having a wide standard deviation between velocities of shots causing the shots to string vertical. Horizonal spread can be wind effect on bullet. At 400 yards it does not take much wind to move that little bullet a long ways. If your spread is all over the place it could be your shooting form mixed in with some of the other things. If you are not using a chrno to tell you what the load is doing it will be VERY HARD to cure your problem. You must know your standard deviation and extreme spread of velocities. With a max listed load of the powders you are using out of a 17" barrel and I assume this is a 223 Rem. your muzzle velocity should be around 2800 fps so at 400 yards it has slowed down a bunch and wind, even a little bit, can greatly effect point of impact. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy problem at distance?
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