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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Having problems with getting consistant velocity
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<blockquote data-quote="Warren Jensen" data-source="post: 21449" data-attributes="member: 21"><p>Unless you are jumping the bullets a long ways to the lands then a large velocity spread of 75 fps. will almost always be attributed to inconsistent ignition and burning of the powder. I would suggest 1. Trying different powders, and 2. trying different primers, in that order. Even in large cases you can get the SD down to under 15 fps. Fifty fps. spread at 1000 yds. is worth .7 minute of angle with your 150s.</p><p></p><p>High velocity is not a cause of inaccuracies but high pressure can, and often is, a cause. Consistent ignition and complete and consistent powder burn is the holy grail of accuracy loads. It is often the case that the most efficient powders for a given cartridge and rifle will give the best velocity and accuracy. It is not very often, however, that the best accuracy is obtainable at the highest safe velocity. That is, in fact, quite rare.</p><p></p><p>[ 12-23-2001: Message edited by: Warren Jensen ]</p></blockquote><p></p>
[QUOTE="Warren Jensen, post: 21449, member: 21"] Unless you are jumping the bullets a long ways to the lands then a large velocity spread of 75 fps. will almost always be attributed to inconsistent ignition and burning of the powder. I would suggest 1. Trying different powders, and 2. trying different primers, in that order. Even in large cases you can get the SD down to under 15 fps. Fifty fps. spread at 1000 yds. is worth .7 minute of angle with your 150s. High velocity is not a cause of inaccuracies but high pressure can, and often is, a cause. Consistent ignition and complete and consistent powder burn is the holy grail of accuracy loads. It is often the case that the most efficient powders for a given cartridge and rifle will give the best velocity and accuracy. It is not very often, however, that the best accuracy is obtainable at the highest safe velocity. That is, in fact, quite rare. [ 12-23-2001: Message edited by: Warren Jensen ] [/QUOTE]
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Having problems with getting consistant velocity
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